21687470

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{491}}^1\times {\mathrm{631}}^1$

素因数の和:1136

約数の個数: 32

約数和(自身を含む): 44775936

約数和(自身を除く): 23088466

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 491, 631, 982, 1262, 2455, 3155, 3437, 4417, 4910, 6310, 6874, 8834, 17185, 22085, 34370, 44170, 309821, 619642, 1549105, 2168747, 3098210, 4337494, 10843735, 21687470]

約数ペア:

[(1, 21687470), (2, 10843735), (5, 4337494), (7, 3098210), (10, 2168747), (14, 1549105), (35, 619642), (70, 309821), (491, 44170), (631, 34370), (982, 22085), (1262, 17185), (2455, 8834), (3155, 6874), (3437, 6310), (4417, 4910)]