20418164

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{157}}^1$

素因数の和:276

約数の個数: 48

約数和(自身を含む): 40320336

約数和(自身を除く): 19902172

約数列:

[1, 2, 4, 13, 26, 41, 52, 61, 82, 122, 157, 164, 244, 314, 533, 628, 793, 1066, 1586, 2041, 2132, 2501, 3172, 4082, 5002, 6437, 8164, 9577, 10004, 12874, 19154, 25748, 32513, 38308, 65026, 83681, 124501, 130052, 167362, 249002, 334724, 392657, 498004, 785314, 1570628, 5104541, 10209082, 20418164]

約数ペア:

[(1, 20418164), (2, 10209082), (4, 5104541), (13, 1570628), (26, 785314), (41, 498004), (52, 392657), (61, 334724), (82, 249002), (122, 167362), (157, 130052), (164, 124501), (244, 83681), (314, 65026), (533, 38308), (628, 32513), (793, 25748), (1066, 19154), (1586, 12874), (2041, 10004), (2132, 9577), (2501, 8164), (3172, 6437), (4082, 5002)]