21210916

素因数分解:

$2^2\times {\mathrm{19}}^2\times {\mathrm{37}}^1\times {\mathrm{397}}^1$

素因数の和:476

約数の個数: 36

約数和(自身を含む): 40335708

約数和(自身を除く): 19124792

約数列:

[1, 2, 4, 19, 37, 38, 74, 76, 148, 361, 397, 703, 722, 794, 1406, 1444, 1588, 2812, 7543, 13357, 14689, 15086, 26714, 29378, 30172, 53428, 58756, 143317, 279091, 286634, 558182, 573268, 1116364, 5302729, 10605458, 21210916]

約数ペア:

[(1, 21210916), (2, 10605458), (4, 5302729), (19, 1116364), (37, 573268), (38, 558182), (74, 286634), (76, 279091), (148, 143317), (361, 58756), (397, 53428), (703, 30172), (722, 29378), (794, 26714), (1406, 15086), (1444, 14689), (1588, 13357), (2812, 7543)]