81302320

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^2\times {\mathrm{37}}^1\times {\mathrm{227}}^1$

素因数の和:299

約数の個数: 120

約数和(自身を含む): 214330032

約数和(自身を除く): 133027712

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 37, 40, 44, 55, 74, 80, 88, 110, 121, 148, 176, 185, 220, 227, 242, 296, 370, 407, 440, 454, 484, 592, 605, 740, 814, 880, 908, 968, 1135, 1210, 1480, 1628, 1816, 1936, 2035, 2270, 2420, 2497, 2960, 3256, 3632, 4070, 4477, 4540, 4840, 4994, 6512, 8140, 8399, 8954, 9080, 9680, 9988, 12485, 16280, 16798, 17908, 18160, 19976, 22385, 24970, 27467, 32560, 33596, 35816, 39952, 41995, 44770, 49940, 54934, 67192, 71632, 83990, 89540, 92389, 99880, 109868, 134384, 137335, 167980, 179080, 184778, 199760, 219736, 274670, 335960, 358160, 369556, 439472, 461945, 549340, 671920, 739112, 923890, 1016279, 1098680, 1478224, 1847780, 2032558, 2197360, 3695560, 4065116, 5081395, 7391120, 8130232, 10162790, 16260464, 20325580, 40651160, 81302320]

約数ペア:

[(1, 81302320), (2, 40651160), (4, 20325580), (5, 16260464), (8, 10162790), (10, 8130232), (11, 7391120), (16, 5081395), (20, 4065116), (22, 3695560), (37, 2197360), (40, 2032558), (44, 1847780), (55, 1478224), (74, 1098680), (80, 1016279), (88, 923890), (110, 739112), (121, 671920), (148, 549340), (176, 461945), (185, 439472), (220, 369556), (227, 358160), (242, 335960), (296, 274670), (370, 219736), (407, 199760), (440, 184778), (454, 179080), (484, 167980), (592, 137335), (605, 134384), (740, 109868), (814, 99880), (880, 92389), (908, 89540), (968, 83990), (1135, 71632), (1210, 67192), (1480, 54934), (1628, 49940), (1816, 44770), (1936, 41995), (2035, 39952), (2270, 35816), (2420, 33596), (2497, 32560), (2960, 27467), (3256, 24970), (3632, 22385), (4070, 19976), (4477, 18160), (4540, 17908), (4840, 16798), (4994, 16280), (6512, 12485), (8140, 9988), (8399, 9680), (8954, 9080)]