20890740

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{26783}}^1$

素因数の和:26808

約数の個数: 48

約数和(自身を含む): 62995968

約数和(自身を除く): 42105228

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 26783, 53566, 80349, 107132, 133915, 160698, 267830, 321396, 348179, 401745, 535660, 696358, 803490, 1044537, 1392716, 1606980, 1740895, 2089074, 3481790, 4178148, 5222685, 6963580, 10445370, 20890740]

約数ペア:

[(1, 20890740), (2, 10445370), (3, 6963580), (4, 5222685), (5, 4178148), (6, 3481790), (10, 2089074), (12, 1740895), (13, 1606980), (15, 1392716), (20, 1044537), (26, 803490), (30, 696358), (39, 535660), (52, 401745), (60, 348179), (65, 321396), (78, 267830), (130, 160698), (156, 133915), (195, 107132), (260, 80349), (390, 53566), (780, 26783)]