20855520

素因数分解:

$2^5\times 3^2\times 5^1\times 7^1\times {\mathrm{2069}}^1$

素因数の和:2097

約数の個数: 144

約数和(自身を含む): 81375840

約数和(自身を除く): 60520320

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 28, 30, 32, 35, 36, 40, 42, 45, 48, 56, 60, 63, 70, 72, 80, 84, 90, 96, 105, 112, 120, 126, 140, 144, 160, 168, 180, 210, 224, 240, 252, 280, 288, 315, 336, 360, 420, 480, 504, 560, 630, 672, 720, 840, 1008, 1120, 1260, 1440, 1680, 2016, 2069, 2520, 3360, 4138, 5040, 6207, 8276, 10080, 10345, 12414, 14483, 16552, 18621, 20690, 24828, 28966, 31035, 33104, 37242, 41380, 43449, 49656, 57932, 62070, 66208, 72415, 74484, 82760, 86898, 93105, 99312, 115864, 124140, 130347, 144830, 148968, 165520, 173796, 186210, 198624, 217245, 231728, 248280, 260694, 289660, 297936, 331040, 347592, 372420, 434490, 463456, 496560, 521388, 579320, 595872, 651735, 695184, 744840, 868980, 993120, 1042776, 1158640, 1303470, 1390368, 1489680, 1737960, 2085552, 2317280, 2606940, 2979360, 3475920, 4171104, 5213880, 6951840, 10427760, 20855520]

約数ペア:

[(1, 20855520), (2, 10427760), (3, 6951840), (4, 5213880), (5, 4171104), (6, 3475920), (7, 2979360), (8, 2606940), (9, 2317280), (10, 2085552), (12, 1737960), (14, 1489680), (15, 1390368), (16, 1303470), (18, 1158640), (20, 1042776), (21, 993120), (24, 868980), (28, 744840), (30, 695184), (32, 651735), (35, 595872), (36, 579320), (40, 521388), (42, 496560), (45, 463456), (48, 434490), (56, 372420), (60, 347592), (63, 331040), (70, 297936), (72, 289660), (80, 260694), (84, 248280), (90, 231728), (96, 217245), (105, 198624), (112, 186210), (120, 173796), (126, 165520), (140, 148968), (144, 144830), (160, 130347), (168, 124140), (180, 115864), (210, 99312), (224, 93105), (240, 86898), (252, 82760), (280, 74484), (288, 72415), (315, 66208), (336, 62070), (360, 57932), (420, 49656), (480, 43449), (504, 41380), (560, 37242), (630, 33104), (672, 31035), (720, 28966), (840, 24828), (1008, 20690), (1120, 18621), (1260, 16552), (1440, 14483), (1680, 12414), (2016, 10345), (2069, 10080), (2520, 8276), (3360, 6207), (4138, 5040)]