81037580

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{311683}}^1$

素因数の和:311705

約数の個数: 24

約数和(自身を含む): 183270192

約数和(自身を除く): 102232612

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 311683, 623366, 1246732, 1558415, 3116830, 4051879, 6233660, 8103758, 16207516, 20259395, 40518790, 81037580]

約数ペア:

[(1, 81037580), (2, 40518790), (4, 20259395), (5, 16207516), (10, 8103758), (13, 6233660), (20, 4051879), (26, 3116830), (52, 1558415), (65, 1246732), (130, 623366), (260, 311683)]