21173360

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{20359}}^1$

素因数の和:20385

約数の個数: 40

約数和(自身を含む): 53017440

約数和(自身を除く): 31844080

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 20359, 40718, 81436, 101795, 162872, 203590, 264667, 325744, 407180, 529334, 814360, 1058668, 1323335, 1628720, 2117336, 2646670, 4234672, 5293340, 10586680, 21173360]

約数ペア:

[(1, 21173360), (2, 10586680), (4, 5293340), (5, 4234672), (8, 2646670), (10, 2117336), (13, 1628720), (16, 1323335), (20, 1058668), (26, 814360), (40, 529334), (52, 407180), (65, 325744), (80, 264667), (104, 203590), (130, 162872), (208, 101795), (260, 81436), (520, 40718), (1040, 20359)]