21510990

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{457}}^1\times {\mathrm{523}}^1$

素因数の和:993

約数の個数: 48

約数和(自身を含む): 56158128

約数和(自身を除く): 34647138

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90, 457, 523, 914, 1046, 1371, 1569, 2285, 2615, 2742, 3138, 4113, 4570, 4707, 5230, 6855, 7845, 8226, 9414, 13710, 15690, 20565, 23535, 41130, 47070, 239011, 478022, 717033, 1195055, 1434066, 2151099, 2390110, 3585165, 4302198, 7170330, 10755495, 21510990]

約数ペア:

[(1, 21510990), (2, 10755495), (3, 7170330), (5, 4302198), (6, 3585165), (9, 2390110), (10, 2151099), (15, 1434066), (18, 1195055), (30, 717033), (45, 478022), (90, 239011), (457, 47070), (523, 41130), (914, 23535), (1046, 20565), (1371, 15690), (1569, 13710), (2285, 9414), (2615, 8226), (2742, 7845), (3138, 6855), (4113, 5230), (4570, 4707)]