19669840

素因数分解:

$2^4\times 5^1\times {\mathrm{71}}^1\times {\mathrm{3463}}^1$

素因数の和:3547

約数の個数: 40

約数和(自身を含む): 46389888

約数和(自身を除く): 26720048

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 71, 80, 142, 284, 355, 568, 710, 1136, 1420, 2840, 3463, 5680, 6926, 13852, 17315, 27704, 34630, 55408, 69260, 138520, 245873, 277040, 491746, 983492, 1229365, 1966984, 2458730, 3933968, 4917460, 9834920, 19669840]

約数ペア:

[(1, 19669840), (2, 9834920), (4, 4917460), (5, 3933968), (8, 2458730), (10, 1966984), (16, 1229365), (20, 983492), (40, 491746), (71, 277040), (80, 245873), (142, 138520), (284, 69260), (355, 55408), (568, 34630), (710, 27704), (1136, 17315), (1420, 13852), (2840, 6926), (3463, 5680)]