21151295

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{89}}^1\times {\mathrm{149}}^1$

素因数の和:283

約数の個数: 32

約数和(自身を含む): 29160000

約数和(自身を除く): 8008705

約数列:

[1, 5, 11, 29, 55, 89, 145, 149, 319, 445, 745, 979, 1595, 1639, 2581, 4321, 4895, 8195, 12905, 13261, 21605, 28391, 47531, 66305, 141955, 145871, 237655, 384569, 729355, 1922845, 4230259, 21151295]

約数ペア:

[(1, 21151295), (5, 4230259), (11, 1922845), (29, 729355), (55, 384569), (89, 237655), (145, 145871), (149, 141955), (319, 66305), (445, 47531), (745, 28391), (979, 21605), (1595, 13261), (1639, 12905), (2581, 8195), (4321, 4895)]