21288735

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{151}}^1\times {\mathrm{241}}^1$

素因数の和:416

約数の個数: 48

約数和(自身を含む): 40168128

約数和(自身を除く): 18879393

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 65, 117, 151, 195, 241, 453, 585, 723, 755, 1205, 1359, 1963, 2169, 2265, 3133, 3615, 5889, 6795, 9399, 9815, 10845, 15665, 17667, 28197, 29445, 36391, 46995, 88335, 109173, 140985, 181955, 327519, 473083, 545865, 1419249, 1637595, 2365415, 4257747, 7096245, 21288735]

約数ペア:

[(1, 21288735), (3, 7096245), (5, 4257747), (9, 2365415), (13, 1637595), (15, 1419249), (39, 545865), (45, 473083), (65, 327519), (117, 181955), (151, 140985), (195, 109173), (241, 88335), (453, 46995), (585, 36391), (723, 29445), (755, 28197), (1205, 17667), (1359, 15665), (1963, 10845), (2169, 9815), (2265, 9399), (3133, 6795), (3615, 5889)]