18987800

素因数分解:

$2^3\times 5^2\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{109}}^1$

素因数の和:205

約数の個数: 96

約数和(自身を含む): 48694800

約数和(自身を除く): 29707000

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 25, 26, 40, 50, 52, 65, 67, 100, 104, 109, 130, 134, 200, 218, 260, 268, 325, 335, 436, 520, 536, 545, 650, 670, 871, 872, 1090, 1300, 1340, 1417, 1675, 1742, 2180, 2600, 2680, 2725, 2834, 3350, 3484, 4355, 4360, 5450, 5668, 6700, 6968, 7085, 7303, 8710, 10900, 11336, 13400, 14170, 14606, 17420, 21775, 21800, 28340, 29212, 34840, 35425, 36515, 43550, 56680, 58424, 70850, 73030, 87100, 94939, 141700, 146060, 174200, 182575, 189878, 283400, 292120, 365150, 379756, 474695, 730300, 759512, 949390, 1460600, 1898780, 2373475, 3797560, 4746950, 9493900, 18987800]

約数ペア:

[(1, 18987800), (2, 9493900), (4, 4746950), (5, 3797560), (8, 2373475), (10, 1898780), (13, 1460600), (20, 949390), (25, 759512), (26, 730300), (40, 474695), (50, 379756), (52, 365150), (65, 292120), (67, 283400), (100, 189878), (104, 182575), (109, 174200), (130, 146060), (134, 141700), (200, 94939), (218, 87100), (260, 73030), (268, 70850), (325, 58424), (335, 56680), (436, 43550), (520, 36515), (536, 35425), (545, 34840), (650, 29212), (670, 28340), (871, 21800), (872, 21775), (1090, 17420), (1300, 14606), (1340, 14170), (1417, 13400), (1675, 11336), (1742, 10900), (2180, 8710), (2600, 7303), (2680, 7085), (2725, 6968), (2834, 6700), (3350, 5668), (3484, 5450), (4355, 4360)]