19781840

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{827}}^1$

素因数の和:876

約数の個数: 80

約数和(自身を含む): 51746688

約数和(自身を除く): 31964848

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 23, 26, 40, 46, 52, 65, 80, 92, 104, 115, 130, 184, 208, 230, 260, 299, 368, 460, 520, 598, 827, 920, 1040, 1196, 1495, 1654, 1840, 2392, 2990, 3308, 4135, 4784, 5980, 6616, 8270, 10751, 11960, 13232, 16540, 19021, 21502, 23920, 33080, 38042, 43004, 53755, 66160, 76084, 86008, 95105, 107510, 152168, 172016, 190210, 215020, 247273, 304336, 380420, 430040, 494546, 760840, 860080, 989092, 1236365, 1521680, 1978184, 2472730, 3956368, 4945460, 9890920, 19781840]

約数ペア:

[(1, 19781840), (2, 9890920), (4, 4945460), (5, 3956368), (8, 2472730), (10, 1978184), (13, 1521680), (16, 1236365), (20, 989092), (23, 860080), (26, 760840), (40, 494546), (46, 430040), (52, 380420), (65, 304336), (80, 247273), (92, 215020), (104, 190210), (115, 172016), (130, 152168), (184, 107510), (208, 95105), (230, 86008), (260, 76084), (299, 66160), (368, 53755), (460, 43004), (520, 38042), (598, 33080), (827, 23920), (920, 21502), (1040, 19021), (1196, 16540), (1495, 13232), (1654, 11960), (1840, 10751), (2392, 8270), (2990, 6616), (3308, 5980), (4135, 4784)]