20213235

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{89}}^1\times {\mathrm{103}}^1$

素因数の和:217

約数の個数: 72

約数和(自身を含む): 41614560

約数和(自身を除く): 21401325

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 49, 63, 89, 103, 105, 147, 245, 267, 309, 315, 441, 445, 515, 623, 721, 735, 801, 927, 1335, 1545, 1869, 2163, 2205, 3115, 3605, 4005, 4361, 4635, 5047, 5607, 6489, 9167, 9345, 10815, 13083, 15141, 21805, 25235, 27501, 28035, 32445, 39249, 45423, 45835, 64169, 65415, 75705, 82503, 137505, 192507, 196245, 227115, 320845, 412515, 449183, 577521, 962535, 1347549, 2245915, 2887605, 4042647, 6737745, 20213235]

約数ペア:

[(1, 20213235), (3, 6737745), (5, 4042647), (7, 2887605), (9, 2245915), (15, 1347549), (21, 962535), (35, 577521), (45, 449183), (49, 412515), (63, 320845), (89, 227115), (103, 196245), (105, 192507), (147, 137505), (245, 82503), (267, 75705), (309, 65415), (315, 64169), (441, 45835), (445, 45423), (515, 39249), (623, 32445), (721, 28035), (735, 27501), (801, 25235), (927, 21805), (1335, 15141), (1545, 13083), (1869, 10815), (2163, 9345), (2205, 9167), (3115, 6489), (3605, 5607), (4005, 5047), (4361, 4635)]