21020970

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{71}}^2\times {\mathrm{139}}^1$

素因数の和:291

約数の個数: 48

約数和(自身を含む): 51539040

約数和(自身を除く): 30518070

約数列:

[1, 2, 3, 5, 6, 10, 15, 30, 71, 139, 142, 213, 278, 355, 417, 426, 695, 710, 834, 1065, 1390, 2085, 2130, 4170, 5041, 9869, 10082, 15123, 19738, 25205, 29607, 30246, 49345, 50410, 59214, 75615, 98690, 148035, 151230, 296070, 700699, 1401398, 2102097, 3503495, 4204194, 7006990, 10510485, 21020970]

約数ペア:

[(1, 21020970), (2, 10510485), (3, 7006990), (5, 4204194), (6, 3503495), (10, 2102097), (15, 1401398), (30, 700699), (71, 296070), (139, 151230), (142, 148035), (213, 98690), (278, 75615), (355, 59214), (417, 50410), (426, 49345), (695, 30246), (710, 29607), (834, 25205), (1065, 19738), (1390, 15123), (2085, 10082), (2130, 9869), (4170, 5041)]