21519940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{2237}}^1$

素因数の和:2296

約数の個数: 48

約数和(自身を含む): 50005872

約数和(自身を除く): 28485932

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 37, 52, 65, 74, 130, 148, 185, 260, 370, 481, 740, 962, 1924, 2237, 2405, 4474, 4810, 8948, 9620, 11185, 22370, 29081, 44740, 58162, 82769, 116324, 145405, 165538, 290810, 331076, 413845, 581620, 827690, 1075997, 1655380, 2151994, 4303988, 5379985, 10759970, 21519940]

約数ペア:

[(1, 21519940), (2, 10759970), (4, 5379985), (5, 4303988), (10, 2151994), (13, 1655380), (20, 1075997), (26, 827690), (37, 581620), (52, 413845), (65, 331076), (74, 290810), (130, 165538), (148, 145405), (185, 116324), (260, 82769), (370, 58162), (481, 44740), (740, 29081), (962, 22370), (1924, 11185), (2237, 9620), (2405, 8948), (4474, 4810)]