20801025

素因数分解:

$3^2\times 5^2\times 7^1\times {\mathrm{47}}^1\times {\mathrm{281}}^1$

素因数の和:351

約数の個数: 72

約数和(自身を含む): 43640064

約数和(自身を除く): 22839039

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 35, 45, 47, 63, 75, 105, 141, 175, 225, 235, 281, 315, 329, 423, 525, 705, 843, 987, 1175, 1405, 1575, 1645, 1967, 2115, 2529, 2961, 3525, 4215, 4935, 5901, 7025, 8225, 9835, 10575, 12645, 13207, 14805, 17703, 21075, 24675, 29505, 39621, 49175, 63225, 66035, 74025, 88515, 92449, 118863, 147525, 198105, 277347, 330175, 442575, 462245, 594315, 832041, 990525, 1386735, 2311225, 2971575, 4160205, 6933675, 20801025]

約数ペア:

[(1, 20801025), (3, 6933675), (5, 4160205), (7, 2971575), (9, 2311225), (15, 1386735), (21, 990525), (25, 832041), (35, 594315), (45, 462245), (47, 442575), (63, 330175), (75, 277347), (105, 198105), (141, 147525), (175, 118863), (225, 92449), (235, 88515), (281, 74025), (315, 66035), (329, 63225), (423, 49175), (525, 39621), (705, 29505), (843, 24675), (987, 21075), (1175, 17703), (1405, 14805), (1575, 13207), (1645, 12645), (1967, 10575), (2115, 9835), (2529, 8225), (2961, 7025), (3525, 5901), (4215, 4935)]