19921480

素因数分解:

$2^3\times 5^1\times {\mathrm{139}}^1\times {\mathrm{3583}}^1$

素因数の和:3733

約数の個数: 32

約数和(自身を含む): 45158400

約数和(自身を除く): 25236920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 139, 278, 556, 695, 1112, 1390, 2780, 3583, 5560, 7166, 14332, 17915, 28664, 35830, 71660, 143320, 498037, 996074, 1992148, 2490185, 3984296, 4980370, 9960740, 19921480]

約数ペア:

[(1, 19921480), (2, 9960740), (4, 4980370), (5, 3984296), (8, 2490185), (10, 1992148), (20, 996074), (40, 498037), (139, 143320), (278, 71660), (556, 35830), (695, 28664), (1112, 17915), (1390, 14332), (2780, 7166), (3583, 5560)]