21520275

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{179}}^1\times {\mathrm{229}}^1$

素因数の和:428

約数の個数: 48

約数和(自身を含む): 41068800

約数和(自身を除く): 19548525

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 75, 105, 175, 179, 229, 525, 537, 687, 895, 1145, 1253, 1603, 2685, 3435, 3759, 4475, 4809, 5725, 6265, 8015, 13425, 17175, 18795, 24045, 31325, 40075, 40991, 93975, 120225, 122973, 204955, 286937, 614865, 860811, 1024775, 1434685, 3074325, 4304055, 7173425, 21520275]

約数ペア:

[(1, 21520275), (3, 7173425), (5, 4304055), (7, 3074325), (15, 1434685), (21, 1024775), (25, 860811), (35, 614865), (75, 286937), (105, 204955), (175, 122973), (179, 120225), (229, 93975), (525, 40991), (537, 40075), (687, 31325), (895, 24045), (1145, 18795), (1253, 17175), (1603, 13425), (2685, 8015), (3435, 6265), (3759, 5725), (4475, 4809)]