291247640

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{72091}}^1$

素因数の和:72203

約数の個数: 32

約数和(自身を含む): 661804560

約数和(自身を除く): 370556920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 202, 404, 505, 808, 1010, 2020, 4040, 72091, 144182, 288364, 360455, 576728, 720910, 1441820, 2883640, 7281191, 14562382, 29124764, 36405955, 58249528, 72811910, 145623820, 291247640]

約数ペア:

[(1, 291247640), (2, 145623820), (4, 72811910), (5, 58249528), (8, 36405955), (10, 29124764), (20, 14562382), (40, 7281191), (101, 2883640), (202, 1441820), (404, 720910), (505, 576728), (808, 360455), (1010, 288364), (2020, 144182), (4040, 72091)]