80821340

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{2137}}^1$

素因数の和:2238

約数の個数: 48

約数和(自身を含む): 178155264

約数和(自身を除く): 97333924

約数列:

[1, 2, 4, 5, 10, 20, 31, 61, 62, 122, 124, 155, 244, 305, 310, 610, 620, 1220, 1891, 2137, 3782, 4274, 7564, 8548, 9455, 10685, 18910, 21370, 37820, 42740, 66247, 130357, 132494, 260714, 264988, 331235, 521428, 651785, 662470, 1303570, 1324940, 2607140, 4041067, 8082134, 16164268, 20205335, 40410670, 80821340]

約数ペア:

[(1, 80821340), (2, 40410670), (4, 20205335), (5, 16164268), (10, 8082134), (20, 4041067), (31, 2607140), (61, 1324940), (62, 1303570), (122, 662470), (124, 651785), (155, 521428), (244, 331235), (305, 264988), (310, 260714), (610, 132494), (620, 130357), (1220, 66247), (1891, 42740), (2137, 37820), (3782, 21370), (4274, 18910), (7564, 10685), (8548, 9455)]