20418975

素因数分解:

$3^2\times 5^2\times {\mathrm{151}}^1\times {\mathrm{601}}^1$

素因数の和:768

約数の個数: 36

約数和(自身を含む): 36876112

約数和(自身を除く): 16457137

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 151, 225, 453, 601, 755, 1359, 1803, 2265, 3005, 3775, 5409, 6795, 9015, 11325, 15025, 27045, 33975, 45075, 90751, 135225, 272253, 453755, 816759, 1361265, 2268775, 4083795, 6806325, 20418975]

約数ペア:

[(1, 20418975), (3, 6806325), (5, 4083795), (9, 2268775), (15, 1361265), (25, 816759), (45, 453755), (75, 272253), (151, 135225), (225, 90751), (453, 45075), (601, 33975), (755, 27045), (1359, 15025), (1803, 11325), (2265, 9015), (3005, 6795), (3775, 5409)]