20778975

素因数分解:

$3^2\times 5^2\times 7^1\times {\mathrm{79}}^1\times {\mathrm{167}}^1$

素因数の和:269

約数の個数: 72

約数和(自身を含む): 43330560

約数和(自身を除く): 22551585

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 35, 45, 63, 75, 79, 105, 167, 175, 225, 237, 315, 395, 501, 525, 553, 711, 835, 1169, 1185, 1503, 1575, 1659, 1975, 2505, 2765, 3507, 3555, 4175, 4977, 5845, 5925, 7515, 8295, 10521, 12525, 13193, 13825, 17535, 17775, 24885, 29225, 37575, 39579, 41475, 52605, 65965, 87675, 92351, 118737, 124425, 197895, 263025, 277053, 329825, 461755, 593685, 831159, 989475, 1385265, 2308775, 2968425, 4155795, 6926325, 20778975]

約数ペア:

[(1, 20778975), (3, 6926325), (5, 4155795), (7, 2968425), (9, 2308775), (15, 1385265), (21, 989475), (25, 831159), (35, 593685), (45, 461755), (63, 329825), (75, 277053), (79, 263025), (105, 197895), (167, 124425), (175, 118737), (225, 92351), (237, 87675), (315, 65965), (395, 52605), (501, 41475), (525, 39579), (553, 37575), (711, 29225), (835, 24885), (1169, 17775), (1185, 17535), (1503, 13825), (1575, 13193), (1659, 12525), (1975, 10521), (2505, 8295), (2765, 7515), (3507, 5925), (3555, 5845), (4175, 4977)]