19718775

素因数分解:

$3^3\times 5^2\times {\mathrm{131}}^1\times {\mathrm{223}}^1$

素因数の和:373

約数の個数: 48

約数和(自身を含む): 36664320

約数和(自身を除く): 16945545

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 131, 135, 223, 225, 393, 655, 669, 675, 1115, 1179, 1965, 2007, 3275, 3345, 3537, 5575, 5895, 6021, 9825, 10035, 16725, 17685, 29213, 29475, 30105, 50175, 87639, 88425, 146065, 150525, 262917, 438195, 730325, 788751, 1314585, 2190975, 3943755, 6572925, 19718775]

約数ペア:

[(1, 19718775), (3, 6572925), (5, 3943755), (9, 2190975), (15, 1314585), (25, 788751), (27, 730325), (45, 438195), (75, 262917), (131, 150525), (135, 146065), (223, 88425), (225, 87639), (393, 50175), (655, 30105), (669, 29475), (675, 29213), (1115, 17685), (1179, 16725), (1965, 10035), (2007, 9825), (3275, 6021), (3345, 5895), (3537, 5575)]