20899870

素因数分解:

$2^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{89}}^1\times {\mathrm{1021}}^1$

素因数の和:1140

約数の個数: 32

約数和(自身を含む): 39735360

約数和(自身を除く): 18835490

約数列:

[1, 2, 5, 10, 23, 46, 89, 115, 178, 230, 445, 890, 1021, 2042, 2047, 4094, 5105, 10210, 10235, 20470, 23483, 46966, 90869, 117415, 181738, 234830, 454345, 908690, 2089987, 4179974, 10449935, 20899870]

約数ペア:

[(1, 20899870), (2, 10449935), (5, 4179974), (10, 2089987), (23, 908690), (46, 454345), (89, 234830), (115, 181738), (178, 117415), (230, 90869), (445, 46966), (890, 23483), (1021, 20470), (2042, 10235), (2047, 10210), (4094, 5105)]