1256741480

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{499}}^1\times {\mathrm{797}}^1$

素因数の和:1386

約数の個数: 64

約数和(自身を含む): 2872800000

約数和(自身を除く): 1616058520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 158, 316, 395, 499, 632, 790, 797, 998, 1580, 1594, 1996, 2495, 3160, 3188, 3985, 3992, 4990, 6376, 7970, 9980, 15940, 19960, 31880, 39421, 62963, 78842, 125926, 157684, 197105, 251852, 314815, 315368, 394210, 397703, 503704, 629630, 788420, 795406, 1259260, 1576840, 1590812, 1988515, 2518520, 3181624, 3977030, 7954060, 15908120, 31418537, 62837074, 125674148, 157092685, 251348296, 314185370, 628370740, 1256741480]

約数ペア:

[(1, 1256741480), (2, 628370740), (4, 314185370), (5, 251348296), (8, 157092685), (10, 125674148), (20, 62837074), (40, 31418537), (79, 15908120), (158, 7954060), (316, 3977030), (395, 3181624), (499, 2518520), (632, 1988515), (790, 1590812), (797, 1576840), (998, 1259260), (1580, 795406), (1594, 788420), (1996, 629630), (2495, 503704), (3160, 397703), (3188, 394210), (3985, 315368), (3992, 314815), (4990, 251852), (6376, 197105), (7970, 157684), (9980, 125926), (15940, 78842), (19960, 62963), (31880, 39421)]