861720

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{167}}^1$

素因数の和:224

約数の個数: 64

約数和(自身を含む): 2661120

約数和(自身を除く): 1799400

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 43, 60, 86, 120, 129, 167, 172, 215, 258, 334, 344, 430, 501, 516, 645, 668, 835, 860, 1002, 1032, 1290, 1336, 1670, 1720, 2004, 2505, 2580, 3340, 4008, 5010, 5160, 6680, 7181, 10020, 14362, 20040, 21543, 28724, 35905, 43086, 57448, 71810, 86172, 107715, 143620, 172344, 215430, 287240, 430860, 861720]

約数ペア:

[(1, 861720), (2, 430860), (3, 287240), (4, 215430), (5, 172344), (6, 143620), (8, 107715), (10, 86172), (12, 71810), (15, 57448), (20, 43086), (24, 35905), (30, 28724), (40, 21543), (43, 20040), (60, 14362), (86, 10020), (120, 7181), (129, 6680), (167, 5160), (172, 5010), (215, 4008), (258, 3340), (334, 2580), (344, 2505), (430, 2004), (501, 1720), (516, 1670), (645, 1336), (668, 1290), (835, 1032), (860, 1002)]