18639380

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{181}}^1\times {\mathrm{271}}^1$

素因数の和:480

約数の個数: 48

約数和(自身を含む): 41583360

約数和(自身を除く): 22943980

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 181, 190, 271, 362, 380, 542, 724, 905, 1084, 1355, 1810, 2710, 3439, 3620, 5149, 5420, 6878, 10298, 13756, 17195, 20596, 25745, 34390, 49051, 51490, 68780, 98102, 102980, 196204, 245255, 490510, 931969, 981020, 1863938, 3727876, 4659845, 9319690, 18639380]

約数ペア:

[(1, 18639380), (2, 9319690), (4, 4659845), (5, 3727876), (10, 1863938), (19, 981020), (20, 931969), (38, 490510), (76, 245255), (95, 196204), (181, 102980), (190, 98102), (271, 68780), (362, 51490), (380, 49051), (542, 34390), (724, 25745), (905, 20596), (1084, 17195), (1355, 13756), (1810, 10298), (2710, 6878), (3439, 5420), (3620, 5149)]