81316720

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{32789}}^1$

素因数の和:32833

約数の個数: 40

約数和(自身を含む): 195166080

約数和(自身を除く): 113849360

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 32789, 65578, 131156, 163945, 262312, 327890, 524624, 655780, 1016459, 1311560, 2032918, 2623120, 4065836, 5082295, 8131672, 10164590, 16263344, 20329180, 40658360, 81316720]

約数ペア:

[(1, 81316720), (2, 40658360), (4, 20329180), (5, 16263344), (8, 10164590), (10, 8131672), (16, 5082295), (20, 4065836), (31, 2623120), (40, 2032918), (62, 1311560), (80, 1016459), (124, 655780), (155, 524624), (248, 327890), (310, 262312), (496, 163945), (620, 131156), (1240, 65578), (2480, 32789)]