20922020

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{37}}^1\times {\mathrm{577}}^1$

素因数の和:637

約数の個数: 72

約数和(自身を含む): 52581816

約数和(自身を除く): 31659796

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 37, 49, 70, 74, 98, 140, 148, 185, 196, 245, 259, 370, 490, 518, 577, 740, 980, 1036, 1154, 1295, 1813, 2308, 2590, 2885, 3626, 4039, 5180, 5770, 7252, 8078, 9065, 11540, 16156, 18130, 20195, 21349, 28273, 36260, 40390, 42698, 56546, 80780, 85396, 106745, 113092, 141365, 149443, 213490, 282730, 298886, 426980, 565460, 597772, 747215, 1046101, 1494430, 2092202, 2988860, 4184404, 5230505, 10461010, 20922020]

約数ペア:

[(1, 20922020), (2, 10461010), (4, 5230505), (5, 4184404), (7, 2988860), (10, 2092202), (14, 1494430), (20, 1046101), (28, 747215), (35, 597772), (37, 565460), (49, 426980), (70, 298886), (74, 282730), (98, 213490), (140, 149443), (148, 141365), (185, 113092), (196, 106745), (245, 85396), (259, 80780), (370, 56546), (490, 42698), (518, 40390), (577, 36260), (740, 28273), (980, 21349), (1036, 20195), (1154, 18130), (1295, 16156), (1813, 11540), (2308, 9065), (2590, 8078), (2885, 7252), (3626, 5770), (4039, 5180)]