638465796

素因数分解:

$2^2\times 3^2\times {\mathrm{71}}^1\times {\mathrm{439}}^1\times {\mathrm{569}}^1$

素因数の和:1089

約数の個数: 72

約数和(自身を含む): 1643241600

約数和(自身を除く): 1004775804

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 71, 142, 213, 284, 426, 439, 569, 639, 852, 878, 1138, 1278, 1317, 1707, 1756, 2276, 2556, 2634, 3414, 3951, 5121, 5268, 6828, 7902, 10242, 15804, 20484, 31169, 40399, 62338, 80798, 93507, 121197, 124676, 161596, 187014, 242394, 249791, 280521, 363591, 374028, 484788, 499582, 561042, 727182, 749373, 999164, 1122084, 1454364, 1498746, 2248119, 2997492, 4496238, 8992476, 17735161, 35470322, 53205483, 70940644, 106410966, 159616449, 212821932, 319232898, 638465796]

約数ペア:

[(1, 638465796), (2, 319232898), (3, 212821932), (4, 159616449), (6, 106410966), (9, 70940644), (12, 53205483), (18, 35470322), (36, 17735161), (71, 8992476), (142, 4496238), (213, 2997492), (284, 2248119), (426, 1498746), (439, 1454364), (569, 1122084), (639, 999164), (852, 749373), (878, 727182), (1138, 561042), (1278, 499582), (1317, 484788), (1707, 374028), (1756, 363591), (2276, 280521), (2556, 249791), (2634, 242394), (3414, 187014), (3951, 161596), (5121, 124676), (5268, 121197), (6828, 93507), (7902, 80798), (10242, 62338), (15804, 40399), (20484, 31169)]