31178920

素因数分解:

$2^3\times 5^1\times {\mathrm{307}}^1\times {\mathrm{2539}}^1$

素因数の和:2857

約数の個数: 32

約数和(自身を含む): 70408800

約数和(自身を除く): 39229880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 307, 614, 1228, 1535, 2456, 2539, 3070, 5078, 6140, 10156, 12280, 12695, 20312, 25390, 50780, 101560, 779473, 1558946, 3117892, 3897365, 6235784, 7794730, 15589460, 31178920]

約数ペア:

[(1, 31178920), (2, 15589460), (4, 7794730), (5, 6235784), (8, 3897365), (10, 3117892), (20, 1558946), (40, 779473), (307, 101560), (614, 50780), (1228, 25390), (1535, 20312), (2456, 12695), (2539, 12280), (3070, 10156), (5078, 6140)]