21787870

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{8821}}^1$

素因数の和:8860

約数の個数: 32

約数和(自身を含む): 44462880

約数和(自身を除く): 22675010

約数列:

[1, 2, 5, 10, 13, 19, 26, 38, 65, 95, 130, 190, 247, 494, 1235, 2470, 8821, 17642, 44105, 88210, 114673, 167599, 229346, 335198, 573365, 837995, 1146730, 1675990, 2178787, 4357574, 10893935, 21787870]

約数ペア:

[(1, 21787870), (2, 10893935), (5, 4357574), (10, 2178787), (13, 1675990), (19, 1146730), (26, 837995), (38, 573365), (65, 335198), (95, 229346), (130, 167599), (190, 114673), (247, 88210), (494, 44105), (1235, 17642), (2470, 8821)]