21251820

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{271}}^1\times {\mathrm{1307}}^1$

素因数の和:1590

約数の個数: 48

約数和(自身を含む): 59770368

約数和(自身を除く): 38518548

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 271, 542, 813, 1084, 1307, 1355, 1626, 2614, 2710, 3252, 3921, 4065, 5228, 5420, 6535, 7842, 8130, 13070, 15684, 16260, 19605, 26140, 39210, 78420, 354197, 708394, 1062591, 1416788, 1770985, 2125182, 3541970, 4250364, 5312955, 7083940, 10625910, 21251820]

約数ペア:

[(1, 21251820), (2, 10625910), (3, 7083940), (4, 5312955), (5, 4250364), (6, 3541970), (10, 2125182), (12, 1770985), (15, 1416788), (20, 1062591), (30, 708394), (60, 354197), (271, 78420), (542, 39210), (813, 26140), (1084, 19605), (1307, 16260), (1355, 15684), (1626, 13070), (2614, 8130), (2710, 7842), (3252, 6535), (3921, 5420), (4065, 5228)]