389778880

素因数分解:

$2^6\times 5^1\times {\mathrm{499}}^1\times {\mathrm{2441}}^1$

素因数の和:2957

約数の個数: 56

約数和(自身を含む): 930402000

約数和(自身を除く): 540623120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 499, 998, 1996, 2441, 2495, 3992, 4882, 4990, 7984, 9764, 9980, 12205, 15968, 19528, 19960, 24410, 31936, 39056, 39920, 48820, 78112, 79840, 97640, 156224, 159680, 195280, 390560, 781120, 1218059, 2436118, 4872236, 6090295, 9744472, 12180590, 19488944, 24361180, 38977888, 48722360, 77955776, 97444720, 194889440, 389778880]

約数ペア:

[(1, 389778880), (2, 194889440), (4, 97444720), (5, 77955776), (8, 48722360), (10, 38977888), (16, 24361180), (20, 19488944), (32, 12180590), (40, 9744472), (64, 6090295), (80, 4872236), (160, 2436118), (320, 1218059), (499, 781120), (998, 390560), (1996, 195280), (2441, 159680), (2495, 156224), (3992, 97640), (4882, 79840), (4990, 78112), (7984, 48820), (9764, 39920), (9980, 39056), (12205, 31936), (15968, 24410), (19528, 19960)]