21282520

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{2621}}^1$

素因数の和:2668

約数の個数: 64

約数和(自身を含む): 56635200

約数和(自身を除く): 35352680

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 29, 35, 40, 56, 58, 70, 116, 140, 145, 203, 232, 280, 290, 406, 580, 812, 1015, 1160, 1624, 2030, 2621, 4060, 5242, 8120, 10484, 13105, 18347, 20968, 26210, 36694, 52420, 73388, 76009, 91735, 104840, 146776, 152018, 183470, 304036, 366940, 380045, 532063, 608072, 733880, 760090, 1064126, 1520180, 2128252, 2660315, 3040360, 4256504, 5320630, 10641260, 21282520]

約数ペア:

[(1, 21282520), (2, 10641260), (4, 5320630), (5, 4256504), (7, 3040360), (8, 2660315), (10, 2128252), (14, 1520180), (20, 1064126), (28, 760090), (29, 733880), (35, 608072), (40, 532063), (56, 380045), (58, 366940), (70, 304036), (116, 183470), (140, 152018), (145, 146776), (203, 104840), (232, 91735), (280, 76009), (290, 73388), (406, 52420), (580, 36694), (812, 26210), (1015, 20968), (1160, 18347), (1624, 13105), (2030, 10484), (2621, 8120), (4060, 5242)]