21325125

素因数分解:

$3^1\times 5^3\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{73}}^1$

素因数の和:151

約数の個数: 64

約数和(自身を含む): 38787840

約数和(自身を除く): 17462715

約数列:

[1, 3, 5, 15, 19, 25, 41, 57, 73, 75, 95, 123, 125, 205, 219, 285, 365, 375, 475, 615, 779, 1025, 1095, 1387, 1425, 1825, 2337, 2375, 2993, 3075, 3895, 4161, 5125, 5475, 6935, 7125, 8979, 9125, 11685, 14965, 15375, 19475, 20805, 27375, 34675, 44895, 56867, 58425, 74825, 97375, 104025, 170601, 173375, 224475, 284335, 292125, 374125, 520125, 853005, 1122375, 1421675, 4265025, 7108375, 21325125]

約数ペア:

[(1, 21325125), (3, 7108375), (5, 4265025), (15, 1421675), (19, 1122375), (25, 853005), (41, 520125), (57, 374125), (73, 292125), (75, 284335), (95, 224475), (123, 173375), (125, 170601), (205, 104025), (219, 97375), (285, 74825), (365, 58425), (375, 56867), (475, 44895), (615, 34675), (779, 27375), (1025, 20805), (1095, 19475), (1387, 15375), (1425, 14965), (1825, 11685), (2337, 9125), (2375, 8979), (2993, 7125), (3075, 6935), (3895, 5475), (4161, 5125)]