20517790

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{139}}^1\times {\mathrm{509}}^1$

素因数の和:684

約数の個数: 32

約数和(自身を含む): 38556000

約数和(自身を除く): 18038210

約数列:

[1, 2, 5, 10, 29, 58, 139, 145, 278, 290, 509, 695, 1018, 1390, 2545, 4031, 5090, 8062, 14761, 20155, 29522, 40310, 70751, 73805, 141502, 147610, 353755, 707510, 2051779, 4103558, 10258895, 20517790]

約数ペア:

[(1, 20517790), (2, 10258895), (5, 4103558), (10, 2051779), (29, 707510), (58, 353755), (139, 147610), (145, 141502), (278, 73805), (290, 70751), (509, 40310), (695, 29522), (1018, 20155), (1390, 14761), (2545, 8062), (4031, 5090)]