81472140

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{263}}^1\times {\mathrm{1721}}^1$

素因数の和:1999

約数の個数: 72

約数和(自身を含む): 248215968

約数和(自身を除く): 166743828

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 263, 526, 789, 1052, 1315, 1578, 1721, 2367, 2630, 3156, 3442, 3945, 4734, 5163, 5260, 6884, 7890, 8605, 9468, 10326, 11835, 15489, 15780, 17210, 20652, 23670, 25815, 30978, 34420, 47340, 51630, 61956, 77445, 103260, 154890, 309780, 452623, 905246, 1357869, 1810492, 2263115, 2715738, 4073607, 4526230, 5431476, 6789345, 8147214, 9052460, 13578690, 16294428, 20368035, 27157380, 40736070, 81472140]

約数ペア:

[(1, 81472140), (2, 40736070), (3, 27157380), (4, 20368035), (5, 16294428), (6, 13578690), (9, 9052460), (10, 8147214), (12, 6789345), (15, 5431476), (18, 4526230), (20, 4073607), (30, 2715738), (36, 2263115), (45, 1810492), (60, 1357869), (90, 905246), (180, 452623), (263, 309780), (526, 154890), (789, 103260), (1052, 77445), (1315, 61956), (1578, 51630), (1721, 47340), (2367, 34420), (2630, 30978), (3156, 25815), (3442, 23670), (3945, 20652), (4734, 17210), (5163, 15780), (5260, 15489), (6884, 11835), (7890, 10326), (8605, 9468)]