20512505

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{179}}^1$

素因数の和:281

約数の個数: 32

約数和(自身を含む): 27941760

約数和(自身を除く): 7429255

約数列:

[1, 5, 13, 41, 43, 65, 179, 205, 215, 533, 559, 895, 1763, 2327, 2665, 2795, 7339, 7697, 8815, 11635, 22919, 36695, 38485, 95407, 100061, 114595, 315577, 477035, 500305, 1577885, 4102501, 20512505]

約数ペア:

[(1, 20512505), (5, 4102501), (13, 1577885), (41, 500305), (43, 477035), (65, 315577), (179, 114595), (205, 100061), (215, 95407), (533, 38485), (559, 36695), (895, 22919), (1763, 11635), (2327, 8815), (2665, 7697), (2795, 7339)]