81997540

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^2\times {\mathrm{41}}^1\times {\mathrm{277}}^1$

素因数の和:365

約数の個数: 72

約数和(自身を含む): 186839352

約数和(自身を除く): 104841812

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 41, 76, 82, 95, 164, 190, 205, 277, 361, 380, 410, 554, 722, 779, 820, 1108, 1385, 1444, 1558, 1805, 2770, 3116, 3610, 3895, 5263, 5540, 7220, 7790, 10526, 11357, 14801, 15580, 21052, 22714, 26315, 29602, 45428, 52630, 56785, 59204, 74005, 99997, 105260, 113570, 148010, 199994, 215783, 227140, 296020, 399988, 431566, 499985, 863132, 999970, 1078915, 1999940, 2157830, 4099877, 4315660, 8199754, 16399508, 20499385, 40998770, 81997540]

約数ペア:

[(1, 81997540), (2, 40998770), (4, 20499385), (5, 16399508), (10, 8199754), (19, 4315660), (20, 4099877), (38, 2157830), (41, 1999940), (76, 1078915), (82, 999970), (95, 863132), (164, 499985), (190, 431566), (205, 399988), (277, 296020), (361, 227140), (380, 215783), (410, 199994), (554, 148010), (722, 113570), (779, 105260), (820, 99997), (1108, 74005), (1385, 59204), (1444, 56785), (1558, 52630), (1805, 45428), (2770, 29602), (3116, 26315), (3610, 22714), (3895, 21052), (5263, 15580), (5540, 14801), (7220, 11357), (7790, 10526)]