21528520

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{2179}}^1$

素因数の和:2222

約数の個数: 64

約数和(自身を含む): 54936000

約数和(自身を除く): 33407480

約数列:

[1, 2, 4, 5, 8, 10, 13, 19, 20, 26, 38, 40, 52, 65, 76, 95, 104, 130, 152, 190, 247, 260, 380, 494, 520, 760, 988, 1235, 1976, 2179, 2470, 4358, 4940, 8716, 9880, 10895, 17432, 21790, 28327, 41401, 43580, 56654, 82802, 87160, 113308, 141635, 165604, 207005, 226616, 283270, 331208, 414010, 538213, 566540, 828020, 1076426, 1133080, 1656040, 2152852, 2691065, 4305704, 5382130, 10764260, 21528520]

約数ペア:

[(1, 21528520), (2, 10764260), (4, 5382130), (5, 4305704), (8, 2691065), (10, 2152852), (13, 1656040), (19, 1133080), (20, 1076426), (26, 828020), (38, 566540), (40, 538213), (52, 414010), (65, 331208), (76, 283270), (95, 226616), (104, 207005), (130, 165604), (152, 141635), (190, 113308), (247, 87160), (260, 82802), (380, 56654), (494, 43580), (520, 41401), (760, 28327), (988, 21790), (1235, 17432), (1976, 10895), (2179, 9880), (2470, 8716), (4358, 4940)]