18931120

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{167}}^1$

素因数の和:302

約数の個数: 80

約数和(自身を含む): 48121920

約数和(自身を除く): 29190800

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 109, 130, 167, 208, 218, 260, 334, 436, 520, 545, 668, 835, 872, 1040, 1090, 1336, 1417, 1670, 1744, 2171, 2180, 2672, 2834, 3340, 4342, 4360, 5668, 6680, 7085, 8684, 8720, 10855, 11336, 13360, 14170, 17368, 18203, 21710, 22672, 28340, 34736, 36406, 43420, 56680, 72812, 86840, 91015, 113360, 145624, 173680, 182030, 236639, 291248, 364060, 473278, 728120, 946556, 1183195, 1456240, 1893112, 2366390, 3786224, 4732780, 9465560, 18931120]

約数ペア:

[(1, 18931120), (2, 9465560), (4, 4732780), (5, 3786224), (8, 2366390), (10, 1893112), (13, 1456240), (16, 1183195), (20, 946556), (26, 728120), (40, 473278), (52, 364060), (65, 291248), (80, 236639), (104, 182030), (109, 173680), (130, 145624), (167, 113360), (208, 91015), (218, 86840), (260, 72812), (334, 56680), (436, 43420), (520, 36406), (545, 34736), (668, 28340), (835, 22672), (872, 21710), (1040, 18203), (1090, 17368), (1336, 14170), (1417, 13360), (1670, 11336), (1744, 10855), (2171, 8720), (2180, 8684), (2672, 7085), (2834, 6680), (3340, 5668), (4342, 4360)]