21150220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{11621}}^1$

素因数の和:11650

約数の個数: 48

約数和(自身を含む): 54669888

約数和(自身を除く): 33519668

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 182, 260, 364, 455, 910, 1820, 11621, 23242, 46484, 58105, 81347, 116210, 151073, 162694, 232420, 302146, 325388, 406735, 604292, 755365, 813470, 1057511, 1510730, 1626940, 2115022, 3021460, 4230044, 5287555, 10575110, 21150220]

約数ペア:

[(1, 21150220), (2, 10575110), (4, 5287555), (5, 4230044), (7, 3021460), (10, 2115022), (13, 1626940), (14, 1510730), (20, 1057511), (26, 813470), (28, 755365), (35, 604292), (52, 406735), (65, 325388), (70, 302146), (91, 232420), (130, 162694), (140, 151073), (182, 116210), (260, 81347), (364, 58105), (455, 46484), (910, 23242), (1820, 11621)]