639900

素因数分解:

$2^2\times 3^4\times 5^2\times {\mathrm{79}}^1$

素因数の和:105

約数の個数: 90

約数和(自身を含む): 2100560

約数和(自身を除く): 1460660

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 25, 27, 30, 36, 45, 50, 54, 60, 75, 79, 81, 90, 100, 108, 135, 150, 158, 162, 180, 225, 237, 270, 300, 316, 324, 395, 405, 450, 474, 540, 675, 711, 790, 810, 900, 948, 1185, 1350, 1422, 1580, 1620, 1975, 2025, 2133, 2370, 2700, 2844, 3555, 3950, 4050, 4266, 4740, 5925, 6399, 7110, 7900, 8100, 8532, 10665, 11850, 12798, 14220, 17775, 21330, 23700, 25596, 31995, 35550, 42660, 53325, 63990, 71100, 106650, 127980, 159975, 213300, 319950, 639900]

約数ペア:

[(1, 639900), (2, 319950), (3, 213300), (4, 159975), (5, 127980), (6, 106650), (9, 71100), (10, 63990), (12, 53325), (15, 42660), (18, 35550), (20, 31995), (25, 25596), (27, 23700), (30, 21330), (36, 17775), (45, 14220), (50, 12798), (54, 11850), (60, 10665), (75, 8532), (79, 8100), (81, 7900), (90, 7110), (100, 6399), (108, 5925), (135, 4740), (150, 4266), (158, 4050), (162, 3950), (180, 3555), (225, 2844), (237, 2700), (270, 2370), (300, 2133), (316, 2025), (324, 1975), (395, 1620), (405, 1580), (450, 1422), (474, 1350), (540, 1185), (675, 948), (711, 900), (790, 810)]