21988225

素因数分解:

$5^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{389}}^1$

素因数の和:442

約数の個数: 48

約数和(自身を含む): 34819200

約数和(自身を除く): 12830975

約数列:

[1, 5, 7, 17, 19, 25, 35, 85, 95, 119, 133, 175, 323, 389, 425, 475, 595, 665, 1615, 1945, 2261, 2723, 2975, 3325, 6613, 7391, 8075, 9725, 11305, 13615, 33065, 36955, 46291, 51737, 56525, 68075, 125647, 165325, 184775, 231455, 258685, 628235, 879529, 1157275, 1293425, 3141175, 4397645, 21988225]

約数ペア:

[(1, 21988225), (5, 4397645), (7, 3141175), (17, 1293425), (19, 1157275), (25, 879529), (35, 628235), (85, 258685), (95, 231455), (119, 184775), (133, 165325), (175, 125647), (323, 68075), (389, 56525), (425, 51737), (475, 46291), (595, 36955), (665, 33065), (1615, 13615), (1945, 11305), (2261, 9725), (2723, 8075), (2975, 7391), (3325, 6613)]