20457885

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{157}}^1$

素因数の和:262

約数の個数: 64

約数和(自身を含む): 40407552

約数和(自身を除く): 19949667

約数列:

[1, 3, 5, 7, 15, 17, 21, 35, 51, 73, 85, 105, 119, 157, 219, 255, 357, 365, 471, 511, 595, 785, 1095, 1099, 1241, 1533, 1785, 2355, 2555, 2669, 3297, 3723, 5495, 6205, 7665, 8007, 8687, 11461, 13345, 16485, 18615, 18683, 26061, 34383, 40035, 43435, 56049, 57305, 80227, 93415, 130305, 171915, 194837, 240681, 280245, 401135, 584511, 974185, 1203405, 1363859, 2922555, 4091577, 6819295, 20457885]

約数ペア:

[(1, 20457885), (3, 6819295), (5, 4091577), (7, 2922555), (15, 1363859), (17, 1203405), (21, 974185), (35, 584511), (51, 401135), (73, 280245), (85, 240681), (105, 194837), (119, 171915), (157, 130305), (219, 93415), (255, 80227), (357, 57305), (365, 56049), (471, 43435), (511, 40035), (595, 34383), (785, 26061), (1095, 18683), (1099, 18615), (1241, 16485), (1533, 13345), (1785, 11461), (2355, 8687), (2555, 8007), (2669, 7665), (3297, 6205), (3723, 5495)]