21363520

素因数分解:

$2^6\times 5^1\times {\mathrm{101}}^1\times {\mathrm{661}}^1$

素因数の和:779

約数の個数: 56

約数和(自身を含む): 51453288

約数和(自身を除く): 30089768

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 101, 160, 202, 320, 404, 505, 661, 808, 1010, 1322, 1616, 2020, 2644, 3232, 3305, 4040, 5288, 6464, 6610, 8080, 10576, 13220, 16160, 21152, 26440, 32320, 42304, 52880, 66761, 105760, 133522, 211520, 267044, 333805, 534088, 667610, 1068176, 1335220, 2136352, 2670440, 4272704, 5340880, 10681760, 21363520]

約数ペア:

[(1, 21363520), (2, 10681760), (4, 5340880), (5, 4272704), (8, 2670440), (10, 2136352), (16, 1335220), (20, 1068176), (32, 667610), (40, 534088), (64, 333805), (80, 267044), (101, 211520), (160, 133522), (202, 105760), (320, 66761), (404, 52880), (505, 42304), (661, 32320), (808, 26440), (1010, 21152), (1322, 16160), (1616, 13220), (2020, 10576), (2644, 8080), (3232, 6610), (3305, 6464), (4040, 5288)]