20728695

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^3\times {\mathrm{17}}^1\times {\mathrm{37}}^1$

素因数の和:101

約数の個数: 64

約数和(自身を含む): 39070080

約数和(自身を除く): 18341385

約数列:

[1, 3, 5, 13, 15, 17, 37, 39, 51, 65, 85, 111, 169, 185, 195, 221, 255, 481, 507, 555, 629, 663, 845, 1105, 1443, 1887, 2197, 2405, 2535, 2873, 3145, 3315, 6253, 6591, 7215, 8177, 8619, 9435, 10985, 14365, 18759, 24531, 31265, 32955, 37349, 40885, 43095, 81289, 93795, 106301, 112047, 122655, 186745, 243867, 318903, 406445, 531505, 560235, 1219335, 1381913, 1594515, 4145739, 6909565, 20728695]

約数ペア:

[(1, 20728695), (3, 6909565), (5, 4145739), (13, 1594515), (15, 1381913), (17, 1219335), (37, 560235), (39, 531505), (51, 406445), (65, 318903), (85, 243867), (111, 186745), (169, 122655), (185, 112047), (195, 106301), (221, 93795), (255, 81289), (481, 43095), (507, 40885), (555, 37349), (629, 32955), (663, 31265), (845, 24531), (1105, 18759), (1443, 14365), (1887, 10985), (2197, 9435), (2405, 8619), (2535, 8177), (2873, 7215), (3145, 6591), (3315, 6253)]