21685440

素因数分解:

$2^6\times 3^1\times 5^1\times 7^2\times {\mathrm{461}}^1$

素因数の和:495

約数の個数: 168

約数和(自身を含む): 80266032

約数和(自身を除く): 58580592

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 32, 35, 40, 42, 48, 49, 56, 60, 64, 70, 80, 84, 96, 98, 105, 112, 120, 140, 147, 160, 168, 192, 196, 210, 224, 240, 245, 280, 294, 320, 336, 392, 420, 448, 461, 480, 490, 560, 588, 672, 735, 784, 840, 922, 960, 980, 1120, 1176, 1344, 1383, 1470, 1568, 1680, 1844, 1960, 2240, 2305, 2352, 2766, 2940, 3136, 3227, 3360, 3688, 3920, 4610, 4704, 5532, 5880, 6454, 6720, 6915, 7376, 7840, 9220, 9408, 9681, 11064, 11760, 12908, 13830, 14752, 15680, 16135, 18440, 19362, 22128, 22589, 23520, 25816, 27660, 29504, 32270, 36880, 38724, 44256, 45178, 47040, 48405, 51632, 55320, 64540, 67767, 73760, 77448, 88512, 90356, 96810, 103264, 110640, 112945, 129080, 135534, 147520, 154896, 180712, 193620, 206528, 221280, 225890, 258160, 271068, 309792, 338835, 361424, 387240, 442560, 451780, 516320, 542136, 619584, 677670, 722848, 774480, 903560, 1032640, 1084272, 1355340, 1445696, 1548960, 1807120, 2168544, 2710680, 3097920, 3614240, 4337088, 5421360, 7228480, 10842720, 21685440]

約数ペア:

[(1, 21685440), (2, 10842720), (3, 7228480), (4, 5421360), (5, 4337088), (6, 3614240), (7, 3097920), (8, 2710680), (10, 2168544), (12, 1807120), (14, 1548960), (15, 1445696), (16, 1355340), (20, 1084272), (21, 1032640), (24, 903560), (28, 774480), (30, 722848), (32, 677670), (35, 619584), (40, 542136), (42, 516320), (48, 451780), (49, 442560), (56, 387240), (60, 361424), (64, 338835), (70, 309792), (80, 271068), (84, 258160), (96, 225890), (98, 221280), (105, 206528), (112, 193620), (120, 180712), (140, 154896), (147, 147520), (160, 135534), (168, 129080), (192, 112945), (196, 110640), (210, 103264), (224, 96810), (240, 90356), (245, 88512), (280, 77448), (294, 73760), (320, 67767), (336, 64540), (392, 55320), (420, 51632), (448, 48405), (461, 47040), (480, 45178), (490, 44256), (560, 38724), (588, 36880), (672, 32270), (735, 29504), (784, 27660), (840, 25816), (922, 23520), (960, 22589), (980, 22128), (1120, 19362), (1176, 18440), (1344, 16135), (1383, 15680), (1470, 14752), (1568, 13830), (1680, 12908), (1844, 11760), (1960, 11064), (2240, 9681), (2305, 9408), (2352, 9220), (2766, 7840), (2940, 7376), (3136, 6915), (3227, 6720), (3360, 6454), (3688, 5880), (3920, 5532), (4610, 4704)]