644885410

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^3\times {\mathrm{149}}^1\times {\mathrm{197}}^1$

素因数の和:392

約数の個数: 64

約数和(自身を含む): 1272348000

約数和(自身を除く): 627462590

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 149, 169, 197, 298, 338, 394, 745, 845, 985, 1490, 1690, 1937, 1970, 2197, 2561, 3874, 4394, 5122, 9685, 10985, 12805, 19370, 21970, 25181, 25610, 29353, 33293, 50362, 58706, 66586, 125905, 146765, 166465, 251810, 293530, 327353, 332930, 381589, 432809, 654706, 763178, 865618, 1636765, 1907945, 2164045, 3273530, 3815890, 4328090, 4960657, 9921314, 24803285, 49606570, 64488541, 128977082, 322442705, 644885410]

約数ペア:

[(1, 644885410), (2, 322442705), (5, 128977082), (10, 64488541), (13, 49606570), (26, 24803285), (65, 9921314), (130, 4960657), (149, 4328090), (169, 3815890), (197, 3273530), (298, 2164045), (338, 1907945), (394, 1636765), (745, 865618), (845, 763178), (985, 654706), (1490, 432809), (1690, 381589), (1937, 332930), (1970, 327353), (2197, 293530), (2561, 251810), (3874, 166465), (4394, 146765), (5122, 125905), (9685, 66586), (10985, 58706), (12805, 50362), (19370, 33293), (21970, 29353), (25181, 25610)]