1388975020

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^2\times {\mathrm{149}}^1\times {\mathrm{211}}^1$

素因数の和:463

約数の個数: 72

約数和(自身を含む): 3014449200

約数和(自身を除く): 1625474180

約数列:

[1, 2, 4, 5, 10, 20, 47, 94, 149, 188, 211, 235, 298, 422, 470, 596, 745, 844, 940, 1055, 1490, 2110, 2209, 2980, 4220, 4418, 7003, 8836, 9917, 11045, 14006, 19834, 22090, 28012, 31439, 35015, 39668, 44180, 49585, 62878, 70030, 99170, 125756, 140060, 157195, 198340, 314390, 329141, 466099, 628780, 658282, 932198, 1316564, 1477633, 1645705, 1864396, 2330495, 2955266, 3291410, 4660990, 5910532, 6582820, 7388165, 9321980, 14776330, 29552660, 69448751, 138897502, 277795004, 347243755, 694487510, 1388975020]

約数ペア:

[(1, 1388975020), (2, 694487510), (4, 347243755), (5, 277795004), (10, 138897502), (20, 69448751), (47, 29552660), (94, 14776330), (149, 9321980), (188, 7388165), (211, 6582820), (235, 5910532), (298, 4660990), (422, 3291410), (470, 2955266), (596, 2330495), (745, 1864396), (844, 1645705), (940, 1477633), (1055, 1316564), (1490, 932198), (2110, 658282), (2209, 628780), (2980, 466099), (4220, 329141), (4418, 314390), (7003, 198340), (8836, 157195), (9917, 140060), (11045, 125756), (14006, 99170), (19834, 70030), (22090, 62878), (28012, 49585), (31439, 44180), (35015, 39668)]