81477540

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{349}}^1\times {\mathrm{1297}}^1$

素因数の和:1661

約数の個数: 72

約数和(自身を含む): 248047800

約数和(自身を除く): 166570260

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 349, 698, 1047, 1297, 1396, 1745, 2094, 2594, 3141, 3490, 3891, 4188, 5188, 5235, 6282, 6485, 6980, 7782, 10470, 11673, 12564, 12970, 15564, 15705, 19455, 20940, 23346, 25940, 31410, 38910, 46692, 58365, 62820, 77820, 116730, 233460, 452653, 905306, 1357959, 1810612, 2263265, 2715918, 4073877, 4526530, 5431836, 6789795, 8147754, 9053060, 13579590, 16295508, 20369385, 27159180, 40738770, 81477540]

約数ペア:

[(1, 81477540), (2, 40738770), (3, 27159180), (4, 20369385), (5, 16295508), (6, 13579590), (9, 9053060), (10, 8147754), (12, 6789795), (15, 5431836), (18, 4526530), (20, 4073877), (30, 2715918), (36, 2263265), (45, 1810612), (60, 1357959), (90, 905306), (180, 452653), (349, 233460), (698, 116730), (1047, 77820), (1297, 62820), (1396, 58365), (1745, 46692), (2094, 38910), (2594, 31410), (3141, 25940), (3490, 23346), (3891, 20940), (4188, 19455), (5188, 15705), (5235, 15564), (6282, 12970), (6485, 12564), (6980, 11673), (7782, 10470)]