20788049360

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19988509}}^1$

素因数の和:19988535

約数の個数: 40

約数和(自身を含む): 52050080040

約数和(自身を除く): 31262030680

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 19988509, 39977018, 79954036, 99942545, 159908072, 199885090, 259850617, 319816144, 399770180, 519701234, 799540360, 1039402468, 1299253085, 1599080720, 2078804936, 2598506170, 4157609872, 5197012340, 10394024680, 20788049360]

約数ペア:

[(1, 20788049360), (2, 10394024680), (4, 5197012340), (5, 4157609872), (8, 2598506170), (10, 2078804936), (13, 1599080720), (16, 1299253085), (20, 1039402468), (26, 799540360), (40, 519701234), (52, 399770180), (65, 319816144), (80, 259850617), (104, 199885090), (130, 159908072), (208, 99942545), (260, 79954036), (520, 39977018), (1040, 19988509)]