210399920

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{149}}^1\times {\mathrm{929}}^1$

素因数の和:1110

約数の個数: 80

約数和(自身を含む): 518940000

約数和(自身を除く): 308540080

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 149, 152, 190, 298, 304, 380, 596, 745, 760, 929, 1192, 1490, 1520, 1858, 2384, 2831, 2980, 3716, 4645, 5662, 5960, 7432, 9290, 11324, 11920, 14155, 14864, 17651, 18580, 22648, 28310, 35302, 37160, 45296, 56620, 70604, 74320, 88255, 113240, 138421, 141208, 176510, 226480, 276842, 282416, 353020, 553684, 692105, 706040, 1107368, 1384210, 1412080, 2214736, 2629999, 2768420, 5259998, 5536840, 10519996, 11073680, 13149995, 21039992, 26299990, 42079984, 52599980, 105199960, 210399920]

約数ペア:

[(1, 210399920), (2, 105199960), (4, 52599980), (5, 42079984), (8, 26299990), (10, 21039992), (16, 13149995), (19, 11073680), (20, 10519996), (38, 5536840), (40, 5259998), (76, 2768420), (80, 2629999), (95, 2214736), (149, 1412080), (152, 1384210), (190, 1107368), (298, 706040), (304, 692105), (380, 553684), (596, 353020), (745, 282416), (760, 276842), (929, 226480), (1192, 176510), (1490, 141208), (1520, 138421), (1858, 113240), (2384, 88255), (2831, 74320), (2980, 70604), (3716, 56620), (4645, 45296), (5662, 37160), (5960, 35302), (7432, 28310), (9290, 22648), (11324, 18580), (11920, 17651), (14155, 14864)]