666776890

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{4133}}^1$

素因数の和:4243

約数の個数: 64

約数和(自身を含む): 1387634976

約数和(自身を除く): 720858086

約数列:

[1, 2, 5, 10, 13, 17, 26, 34, 65, 73, 85, 130, 146, 170, 221, 365, 442, 730, 949, 1105, 1241, 1898, 2210, 2482, 4133, 4745, 6205, 8266, 9490, 12410, 16133, 20665, 32266, 41330, 53729, 70261, 80665, 107458, 140522, 161330, 268645, 301709, 351305, 537290, 603418, 702610, 913393, 1508545, 1826786, 3017090, 3922217, 4566965, 5129053, 7844434, 9133930, 10258106, 19611085, 25645265, 39222170, 51290530, 66677689, 133355378, 333388445, 666776890]

約数ペア:

[(1, 666776890), (2, 333388445), (5, 133355378), (10, 66677689), (13, 51290530), (17, 39222170), (26, 25645265), (34, 19611085), (65, 10258106), (73, 9133930), (85, 7844434), (130, 5129053), (146, 4566965), (170, 3922217), (221, 3017090), (365, 1826786), (442, 1508545), (730, 913393), (949, 702610), (1105, 603418), (1241, 537290), (1898, 351305), (2210, 301709), (2482, 268645), (4133, 161330), (4745, 140522), (6205, 107458), (8266, 80665), (9490, 70261), (12410, 53729), (16133, 41330), (20665, 32266)]