21220920

素因数分解:

$2^3\times 3^3\times 5^1\times 7^2\times {\mathrm{401}}^1$

素因数の和:435

約数の個数: 192

約数和(自身を含む): 82490400

約数和(自身を除く): 61269480

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 18, 20, 21, 24, 27, 28, 30, 35, 36, 40, 42, 45, 49, 54, 56, 60, 63, 70, 72, 84, 90, 98, 105, 108, 120, 126, 135, 140, 147, 168, 180, 189, 196, 210, 216, 245, 252, 270, 280, 294, 315, 360, 378, 392, 401, 420, 441, 490, 504, 540, 588, 630, 735, 756, 802, 840, 882, 945, 980, 1080, 1176, 1203, 1260, 1323, 1470, 1512, 1604, 1764, 1890, 1960, 2005, 2205, 2406, 2520, 2646, 2807, 2940, 3208, 3528, 3609, 3780, 4010, 4410, 4812, 5292, 5614, 5880, 6015, 6615, 7218, 7560, 8020, 8421, 8820, 9624, 10584, 10827, 11228, 12030, 13230, 14035, 14436, 16040, 16842, 17640, 18045, 19649, 21654, 22456, 24060, 25263, 26460, 28070, 28872, 33684, 36090, 39298, 42105, 43308, 48120, 50526, 52920, 54135, 56140, 58947, 67368, 72180, 75789, 78596, 84210, 86616, 98245, 101052, 108270, 112280, 117894, 126315, 144360, 151578, 157192, 168420, 176841, 196490, 202104, 216540, 235788, 252630, 294735, 303156, 336840, 353682, 378945, 392980, 433080, 471576, 505260, 530523, 589470, 606312, 707364, 757890, 785960, 884205, 1010520, 1061046, 1178940, 1414728, 1515780, 1768410, 2122092, 2357880, 2652615, 3031560, 3536820, 4244184, 5305230, 7073640, 10610460, 21220920]

約数ペア:

[(1, 21220920), (2, 10610460), (3, 7073640), (4, 5305230), (5, 4244184), (6, 3536820), (7, 3031560), (8, 2652615), (9, 2357880), (10, 2122092), (12, 1768410), (14, 1515780), (15, 1414728), (18, 1178940), (20, 1061046), (21, 1010520), (24, 884205), (27, 785960), (28, 757890), (30, 707364), (35, 606312), (36, 589470), (40, 530523), (42, 505260), (45, 471576), (49, 433080), (54, 392980), (56, 378945), (60, 353682), (63, 336840), (70, 303156), (72, 294735), (84, 252630), (90, 235788), (98, 216540), (105, 202104), (108, 196490), (120, 176841), (126, 168420), (135, 157192), (140, 151578), (147, 144360), (168, 126315), (180, 117894), (189, 112280), (196, 108270), (210, 101052), (216, 98245), (245, 86616), (252, 84210), (270, 78596), (280, 75789), (294, 72180), (315, 67368), (360, 58947), (378, 56140), (392, 54135), (401, 52920), (420, 50526), (441, 48120), (490, 43308), (504, 42105), (540, 39298), (588, 36090), (630, 33684), (735, 28872), (756, 28070), (802, 26460), (840, 25263), (882, 24060), (945, 22456), (980, 21654), (1080, 19649), (1176, 18045), (1203, 17640), (1260, 16842), (1323, 16040), (1470, 14436), (1512, 14035), (1604, 13230), (1764, 12030), (1890, 11228), (1960, 10827), (2005, 10584), (2205, 9624), (2406, 8820), (2520, 8421), (2646, 8020), (2807, 7560), (2940, 7218), (3208, 6615), (3528, 6015), (3609, 5880), (3780, 5614), (4010, 5292), (4410, 4812)]