21288225

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1$

素因数の和:127

約数の個数: 96

約数和(自身を含む): 43997184

約数和(自身を除く): 22708959

約数列:

[1, 3, 5, 7, 15, 21, 23, 25, 35, 41, 43, 69, 75, 105, 115, 123, 129, 161, 175, 205, 215, 287, 301, 345, 483, 525, 575, 615, 645, 805, 861, 903, 943, 989, 1025, 1075, 1435, 1505, 1725, 1763, 2415, 2829, 2967, 3075, 3225, 4025, 4305, 4515, 4715, 4945, 5289, 6601, 6923, 7175, 7525, 8815, 12075, 12341, 14145, 14835, 19803, 20769, 21525, 22575, 23575, 24725, 26445, 33005, 34615, 37023, 40549, 44075, 61705, 70725, 74175, 99015, 103845, 121647, 132225, 165025, 173075, 185115, 202745, 283843, 308525, 495075, 519225, 608235, 851529, 925575, 1013725, 1419215, 3041175, 4257645, 7096075, 21288225]

約数ペア:

[(1, 21288225), (3, 7096075), (5, 4257645), (7, 3041175), (15, 1419215), (21, 1013725), (23, 925575), (25, 851529), (35, 608235), (41, 519225), (43, 495075), (69, 308525), (75, 283843), (105, 202745), (115, 185115), (123, 173075), (129, 165025), (161, 132225), (175, 121647), (205, 103845), (215, 99015), (287, 74175), (301, 70725), (345, 61705), (483, 44075), (525, 40549), (575, 37023), (615, 34615), (645, 33005), (805, 26445), (861, 24725), (903, 23575), (943, 22575), (989, 21525), (1025, 20769), (1075, 19803), (1435, 14835), (1505, 14145), (1725, 12341), (1763, 12075), (2415, 8815), (2829, 7525), (2967, 7175), (3075, 6923), (3225, 6601), (4025, 5289), (4305, 4945), (4515, 4715)]