21336680

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{17207}}^1$

素因数の和:17249

約数の個数: 32

約数和(自身を含む): 49559040

約数和(自身を除く): 28222360

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 17207, 34414, 68828, 86035, 137656, 172070, 344140, 533417, 688280, 1066834, 2133668, 2667085, 4267336, 5334170, 10668340, 21336680]

約数ペア:

[(1, 21336680), (2, 10668340), (4, 5334170), (5, 4267336), (8, 2667085), (10, 2133668), (20, 1066834), (31, 688280), (40, 533417), (62, 344140), (124, 172070), (155, 137656), (248, 86035), (310, 68828), (620, 34414), (1240, 17207)]