20331440

素因数分解:

$2^4\times 5^1\times {\mathrm{79}}^1\times {\mathrm{3217}}^1$

素因数の和:3309

約数の個数: 40

約数和(自身を含む): 47883840

約数和(自身を除く): 27552400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 79, 80, 158, 316, 395, 632, 790, 1264, 1580, 3160, 3217, 6320, 6434, 12868, 16085, 25736, 32170, 51472, 64340, 128680, 254143, 257360, 508286, 1016572, 1270715, 2033144, 2541430, 4066288, 5082860, 10165720, 20331440]

約数ペア:

[(1, 20331440), (2, 10165720), (4, 5082860), (5, 4066288), (8, 2541430), (10, 2033144), (16, 1270715), (20, 1016572), (40, 508286), (79, 257360), (80, 254143), (158, 128680), (316, 64340), (395, 51472), (632, 32170), (790, 25736), (1264, 16085), (1580, 12868), (3160, 6434), (3217, 6320)]