20325580

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{37}}^1\times {\mathrm{227}}^1$

素因数の和:295

約数の個数: 72

約数和(自身を含む): 48397104

約数和(自身を除く): 28071524

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 37, 44, 55, 74, 110, 121, 148, 185, 220, 227, 242, 370, 407, 454, 484, 605, 740, 814, 908, 1135, 1210, 1628, 2035, 2270, 2420, 2497, 4070, 4477, 4540, 4994, 8140, 8399, 8954, 9988, 12485, 16798, 17908, 22385, 24970, 27467, 33596, 41995, 44770, 49940, 54934, 83990, 89540, 92389, 109868, 137335, 167980, 184778, 274670, 369556, 461945, 549340, 923890, 1016279, 1847780, 2032558, 4065116, 5081395, 10162790, 20325580]

約数ペア:

[(1, 20325580), (2, 10162790), (4, 5081395), (5, 4065116), (10, 2032558), (11, 1847780), (20, 1016279), (22, 923890), (37, 549340), (44, 461945), (55, 369556), (74, 274670), (110, 184778), (121, 167980), (148, 137335), (185, 109868), (220, 92389), (227, 89540), (242, 83990), (370, 54934), (407, 49940), (454, 44770), (484, 41995), (605, 33596), (740, 27467), (814, 24970), (908, 22385), (1135, 17908), (1210, 16798), (1628, 12485), (2035, 9988), (2270, 8954), (2420, 8399), (2497, 8140), (4070, 4994), (4477, 4540)]