21230560

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{173}}^1$

素因数の和:260

約数の個数: 96

約数和(自身を含む): 55248480

約数和(自身を除く): 34017920

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 59, 65, 80, 104, 118, 130, 160, 173, 208, 236, 260, 295, 346, 416, 472, 520, 590, 692, 767, 865, 944, 1040, 1180, 1384, 1534, 1730, 1888, 2080, 2249, 2360, 2768, 3068, 3460, 3835, 4498, 4720, 5536, 6136, 6920, 7670, 8996, 9440, 10207, 11245, 12272, 13840, 15340, 17992, 20414, 22490, 24544, 27680, 30680, 35984, 40828, 44980, 51035, 61360, 71968, 81656, 89960, 102070, 122720, 132691, 163312, 179920, 204140, 265382, 326624, 359840, 408280, 530764, 663455, 816560, 1061528, 1326910, 1633120, 2123056, 2653820, 4246112, 5307640, 10615280, 21230560]

約数ペア:

[(1, 21230560), (2, 10615280), (4, 5307640), (5, 4246112), (8, 2653820), (10, 2123056), (13, 1633120), (16, 1326910), (20, 1061528), (26, 816560), (32, 663455), (40, 530764), (52, 408280), (59, 359840), (65, 326624), (80, 265382), (104, 204140), (118, 179920), (130, 163312), (160, 132691), (173, 122720), (208, 102070), (236, 89960), (260, 81656), (295, 71968), (346, 61360), (416, 51035), (472, 44980), (520, 40828), (590, 35984), (692, 30680), (767, 27680), (865, 24544), (944, 22490), (1040, 20414), (1180, 17992), (1384, 15340), (1534, 13840), (1730, 12272), (1888, 11245), (2080, 10207), (2249, 9440), (2360, 8996), (2768, 7670), (3068, 6920), (3460, 6136), (3835, 5536), (4498, 4720)]