21179515

素因数分解:

$5^1\times 7^2\times {\mathrm{137}}^1\times {\mathrm{631}}^1$

素因数の和:787

約数の個数: 24

約数和(自身を含む): 29827872

約数和(自身を除く): 8648357

約数列:

[1, 5, 7, 35, 49, 137, 245, 631, 685, 959, 3155, 4417, 4795, 6713, 22085, 30919, 33565, 86447, 154595, 432235, 605129, 3025645, 4235903, 21179515]

約数ペア:

[(1, 21179515), (5, 4235903), (7, 3025645), (35, 605129), (49, 432235), (137, 154595), (245, 86447), (631, 33565), (685, 30919), (959, 22085), (3155, 6713), (4417, 4795)]