20812160

素因数分解:

$2^7\times 5^1\times {\mathrm{31}}^1\times {\mathrm{1049}}^1$

素因数の和:1099

約数の個数: 64

約数和(自身を含む): 51408000

約数和(自身を除く): 30595840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 128, 155, 160, 248, 310, 320, 496, 620, 640, 992, 1049, 1240, 1984, 2098, 2480, 3968, 4196, 4960, 5245, 8392, 9920, 10490, 16784, 19840, 20980, 32519, 33568, 41960, 65038, 67136, 83920, 130076, 134272, 162595, 167840, 260152, 325190, 335680, 520304, 650380, 671360, 1040608, 1300760, 2081216, 2601520, 4162432, 5203040, 10406080, 20812160]

約数ペア:

[(1, 20812160), (2, 10406080), (4, 5203040), (5, 4162432), (8, 2601520), (10, 2081216), (16, 1300760), (20, 1040608), (31, 671360), (32, 650380), (40, 520304), (62, 335680), (64, 325190), (80, 260152), (124, 167840), (128, 162595), (155, 134272), (160, 130076), (248, 83920), (310, 67136), (320, 65038), (496, 41960), (620, 33568), (640, 32519), (992, 20980), (1049, 19840), (1240, 16784), (1984, 10490), (2098, 9920), (2480, 8392), (3968, 5245), (4196, 4960)]