20305480

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{2297}}^1$

素因数の和:2338

約数の個数: 64

約数和(自身を含む): 52118640

約数和(自身を除く): 31813160

約数列:

[1, 2, 4, 5, 8, 10, 13, 17, 20, 26, 34, 40, 52, 65, 68, 85, 104, 130, 136, 170, 221, 260, 340, 442, 520, 680, 884, 1105, 1768, 2210, 2297, 4420, 4594, 8840, 9188, 11485, 18376, 22970, 29861, 39049, 45940, 59722, 78098, 91880, 119444, 149305, 156196, 195245, 238888, 298610, 312392, 390490, 507637, 597220, 780980, 1015274, 1194440, 1561960, 2030548, 2538185, 4061096, 5076370, 10152740, 20305480]

約数ペア:

[(1, 20305480), (2, 10152740), (4, 5076370), (5, 4061096), (8, 2538185), (10, 2030548), (13, 1561960), (17, 1194440), (20, 1015274), (26, 780980), (34, 597220), (40, 507637), (52, 390490), (65, 312392), (68, 298610), (85, 238888), (104, 195245), (130, 156196), (136, 149305), (170, 119444), (221, 91880), (260, 78098), (340, 59722), (442, 45940), (520, 39049), (680, 29861), (884, 22970), (1105, 18376), (1768, 11485), (2210, 9188), (2297, 8840), (4420, 4594)]