20263490

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{173}}^1$

素因数の和:263

約数の個数: 64

約数和(自身を含む): 42620256

約数和(自身を除く): 22356766

約数列:

[1, 2, 5, 10, 13, 17, 26, 34, 53, 65, 85, 106, 130, 170, 173, 221, 265, 346, 442, 530, 689, 865, 901, 1105, 1378, 1730, 1802, 2210, 2249, 2941, 3445, 4498, 4505, 5882, 6890, 9010, 9169, 11245, 11713, 14705, 18338, 22490, 23426, 29410, 38233, 45845, 58565, 76466, 91690, 117130, 119197, 155873, 191165, 238394, 311746, 382330, 595985, 779365, 1191970, 1558730, 2026349, 4052698, 10131745, 20263490]

約数ペア:

[(1, 20263490), (2, 10131745), (5, 4052698), (10, 2026349), (13, 1558730), (17, 1191970), (26, 779365), (34, 595985), (53, 382330), (65, 311746), (85, 238394), (106, 191165), (130, 155873), (170, 119197), (173, 117130), (221, 91690), (265, 76466), (346, 58565), (442, 45845), (530, 38233), (689, 29410), (865, 23426), (901, 22490), (1105, 18338), (1378, 14705), (1730, 11713), (1802, 11245), (2210, 9169), (2249, 9010), (2941, 6890), (3445, 5882), (4498, 4505)]