20813810

素因数分解:

$2^1\times 5^1\times {\mathrm{61}}^1\times {\mathrm{149}}^1\times {\mathrm{229}}^1$

素因数の和:446

約数の個数: 32

約数和(自身を含む): 38502000

約数和(自身を除く): 17688190

約数列:

[1, 2, 5, 10, 61, 122, 149, 229, 298, 305, 458, 610, 745, 1145, 1490, 2290, 9089, 13969, 18178, 27938, 34121, 45445, 68242, 69845, 90890, 139690, 170605, 341210, 2081381, 4162762, 10406905, 20813810]

約数ペア:

[(1, 20813810), (2, 10406905), (5, 4162762), (10, 2081381), (61, 341210), (122, 170605), (149, 139690), (229, 90890), (298, 69845), (305, 68242), (458, 45445), (610, 34121), (745, 27938), (1145, 18178), (1490, 13969), (2290, 9089)]