81961520

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{33049}}^1$

素因数の和:33093

約数の個数: 40

約数和(自身を含む): 196713600

約数和(自身を除く): 114752080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 33049, 66098, 132196, 165245, 264392, 330490, 528784, 660980, 1024519, 1321960, 2049038, 2643920, 4098076, 5122595, 8196152, 10245190, 16392304, 20490380, 40980760, 81961520]

約数ペア:

[(1, 81961520), (2, 40980760), (4, 20490380), (5, 16392304), (8, 10245190), (10, 8196152), (16, 5122595), (20, 4098076), (31, 2643920), (40, 2049038), (62, 1321960), (80, 1024519), (124, 660980), (155, 528784), (248, 330490), (310, 264392), (496, 165245), (620, 132196), (1240, 66098), (2480, 33049)]