19844960

素因数分解:

$2^5\times 5^1\times {\mathrm{31}}^1\times {\mathrm{4001}}^1$

素因数の和:4047

約数の個数: 48

約数和(自身を含む): 48408192

約数和(自身を除く): 28563232

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 80, 124, 155, 160, 248, 310, 496, 620, 992, 1240, 2480, 4001, 4960, 8002, 16004, 20005, 32008, 40010, 64016, 80020, 124031, 128032, 160040, 248062, 320080, 496124, 620155, 640160, 992248, 1240310, 1984496, 2480620, 3968992, 4961240, 9922480, 19844960]

約数ペア:

[(1, 19844960), (2, 9922480), (4, 4961240), (5, 3968992), (8, 2480620), (10, 1984496), (16, 1240310), (20, 992248), (31, 640160), (32, 620155), (40, 496124), (62, 320080), (80, 248062), (124, 160040), (155, 128032), (160, 124031), (248, 80020), (310, 64016), (496, 40010), (620, 32008), (992, 20005), (1240, 16004), (2480, 8002), (4001, 4960)]