258148520

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{921959}}^1$

素因数の和:921977

約数の個数: 32

約数和(自身を含む): 663811200

約数和(自身を除く): 405662680

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 921959, 1843918, 3687836, 4609795, 6453713, 7375672, 9219590, 12907426, 18439180, 25814852, 32268565, 36878360, 51629704, 64537130, 129074260, 258148520]

約数ペア:

[(1, 258148520), (2, 129074260), (4, 64537130), (5, 51629704), (7, 36878360), (8, 32268565), (10, 25814852), (14, 18439180), (20, 12907426), (28, 9219590), (35, 7375672), (40, 6453713), (56, 4609795), (70, 3687836), (140, 1843918), (280, 921959)]