20953010

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{499}}^1$

素因数の和:555

約数の個数: 64

約数和(自身を含む): 45360000

約数和(自身を除く): 24406990

約数列:

[1, 2, 5, 10, 13, 17, 19, 26, 34, 38, 65, 85, 95, 130, 170, 190, 221, 247, 323, 442, 494, 499, 646, 998, 1105, 1235, 1615, 2210, 2470, 2495, 3230, 4199, 4990, 6487, 8398, 8483, 9481, 12974, 16966, 18962, 20995, 32435, 41990, 42415, 47405, 64870, 84830, 94810, 110279, 123253, 161177, 220558, 246506, 322354, 551395, 616265, 805885, 1102790, 1232530, 1611770, 2095301, 4190602, 10476505, 20953010]

約数ペア:

[(1, 20953010), (2, 10476505), (5, 4190602), (10, 2095301), (13, 1611770), (17, 1232530), (19, 1102790), (26, 805885), (34, 616265), (38, 551395), (65, 322354), (85, 246506), (95, 220558), (130, 161177), (170, 123253), (190, 110279), (221, 94810), (247, 84830), (323, 64870), (442, 47405), (494, 42415), (499, 41990), (646, 32435), (998, 20995), (1105, 18962), (1235, 16966), (1615, 12974), (2210, 9481), (2470, 8483), (2495, 8398), (3230, 6487), (4199, 4990)]