78637720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{163}}^1\times {\mathrm{1723}}^1$

素因数の和:1904

約数の個数: 64

約数和(自身を含む): 203569920

約数和(自身を除く): 124932200

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 163, 280, 326, 652, 815, 1141, 1304, 1630, 1723, 2282, 3260, 3446, 4564, 5705, 6520, 6892, 8615, 9128, 11410, 12061, 13784, 17230, 22820, 24122, 34460, 45640, 48244, 60305, 68920, 96488, 120610, 241220, 280849, 482440, 561698, 1123396, 1404245, 1965943, 2246792, 2808490, 3931886, 5616980, 7863772, 9829715, 11233960, 15727544, 19659430, 39318860, 78637720]

約数ペア:

[(1, 78637720), (2, 39318860), (4, 19659430), (5, 15727544), (7, 11233960), (8, 9829715), (10, 7863772), (14, 5616980), (20, 3931886), (28, 2808490), (35, 2246792), (40, 1965943), (56, 1404245), (70, 1123396), (140, 561698), (163, 482440), (280, 280849), (326, 241220), (652, 120610), (815, 96488), (1141, 68920), (1304, 60305), (1630, 48244), (1723, 45640), (2282, 34460), (3260, 24122), (3446, 22820), (4564, 17230), (5705, 13784), (6520, 12061), (6892, 11410), (8615, 9128)]