21212840

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{1303}}^1$

素因数の和:1362

約数の個数: 64

約数和(自身を含む): 53516160

約数和(自身を除く): 32303320

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 37, 40, 44, 55, 74, 88, 110, 148, 185, 220, 296, 370, 407, 440, 740, 814, 1303, 1480, 1628, 2035, 2606, 3256, 4070, 5212, 6515, 8140, 10424, 13030, 14333, 16280, 26060, 28666, 48211, 52120, 57332, 71665, 96422, 114664, 143330, 192844, 241055, 286660, 385688, 482110, 530321, 573320, 964220, 1060642, 1928440, 2121284, 2651605, 4242568, 5303210, 10606420, 21212840]

約数ペア:

[(1, 21212840), (2, 10606420), (4, 5303210), (5, 4242568), (8, 2651605), (10, 2121284), (11, 1928440), (20, 1060642), (22, 964220), (37, 573320), (40, 530321), (44, 482110), (55, 385688), (74, 286660), (88, 241055), (110, 192844), (148, 143330), (185, 114664), (220, 96422), (296, 71665), (370, 57332), (407, 52120), (440, 48211), (740, 28666), (814, 26060), (1303, 16280), (1480, 14333), (1628, 13030), (2035, 10424), (2606, 8140), (3256, 6515), (4070, 5212)]