21236475

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{947}}^1$

素因数の和:996

約数の個数: 48

約数和(自身を含む): 39497472

約数和(自身を除く): 18260997

約数列:

[1, 3, 5, 13, 15, 23, 25, 39, 65, 69, 75, 115, 195, 299, 325, 345, 575, 897, 947, 975, 1495, 1725, 2841, 4485, 4735, 7475, 12311, 14205, 21781, 22425, 23675, 36933, 61555, 65343, 71025, 108905, 184665, 283153, 307775, 326715, 544525, 849459, 923325, 1415765, 1633575, 4247295, 7078825, 21236475]

約数ペア:

[(1, 21236475), (3, 7078825), (5, 4247295), (13, 1633575), (15, 1415765), (23, 923325), (25, 849459), (39, 544525), (65, 326715), (69, 307775), (75, 283153), (115, 184665), (195, 108905), (299, 71025), (325, 65343), (345, 61555), (575, 36933), (897, 23675), (947, 22425), (975, 21781), (1495, 14205), (1725, 12311), (2841, 7475), (4485, 4735)]