20531875

素因数分解:

$5^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^2$

素因数の和:78

約数の個数: 60

約数和(自身を含む): 33326832

約数和(自身を除く): 12794957

約数列:

[1, 5, 7, 13, 19, 25, 35, 65, 91, 95, 125, 133, 175, 247, 325, 361, 455, 475, 625, 665, 875, 1235, 1625, 1729, 1805, 2275, 2375, 2527, 3325, 4375, 4693, 6175, 8125, 8645, 9025, 11375, 11875, 12635, 16625, 23465, 30875, 32851, 43225, 45125, 56875, 63175, 83125, 117325, 154375, 164255, 216125, 225625, 315875, 586625, 821275, 1080625, 1579375, 2933125, 4106375, 20531875]

約数ペア:

[(1, 20531875), (5, 4106375), (7, 2933125), (13, 1579375), (19, 1080625), (25, 821275), (35, 586625), (65, 315875), (91, 225625), (95, 216125), (125, 164255), (133, 154375), (175, 117325), (247, 83125), (325, 63175), (361, 56875), (455, 45125), (475, 43225), (625, 32851), (665, 30875), (875, 23465), (1235, 16625), (1625, 12635), (1729, 11875), (1805, 11375), (2275, 9025), (2375, 8645), (2527, 8125), (3325, 6175), (4375, 4693)]