865388620

素因数分解:

$2^2\times 5^1\times {\mathrm{131}}^1\times {\mathrm{557}}^1\times {\mathrm{593}}^1$

素因数の和:1290

約数の個数: 48

約数和(自身を含む): 1837569888

約数和(自身を除く): 972181268

約数列:

[1, 2, 4, 5, 10, 20, 131, 262, 524, 557, 593, 655, 1114, 1186, 1310, 2228, 2372, 2620, 2785, 2965, 5570, 5930, 11140, 11860, 72967, 77683, 145934, 155366, 291868, 310732, 330301, 364835, 388415, 660602, 729670, 776830, 1321204, 1459340, 1553660, 1651505, 3303010, 6606020, 43269431, 86538862, 173077724, 216347155, 432694310, 865388620]

約数ペア:

[(1, 865388620), (2, 432694310), (4, 216347155), (5, 173077724), (10, 86538862), (20, 43269431), (131, 6606020), (262, 3303010), (524, 1651505), (557, 1553660), (593, 1459340), (655, 1321204), (1114, 776830), (1186, 729670), (1310, 660602), (2228, 388415), (2372, 364835), (2620, 330301), (2785, 310732), (2965, 291868), (5570, 155366), (5930, 145934), (11140, 77683), (11860, 72967)]