21447975

素因数分解:

$3^1\times 5^2\times {\mathrm{37}}^1\times {\mathrm{59}}^1\times {\mathrm{131}}^1$

素因数の和:240

約数の個数: 48

約数和(自身を含む): 37319040

約数和(自身を除く): 15871065

約数列:

[1, 3, 5, 15, 25, 37, 59, 75, 111, 131, 177, 185, 295, 393, 555, 655, 885, 925, 1475, 1965, 2183, 2775, 3275, 4425, 4847, 6549, 7729, 9825, 10915, 14541, 23187, 24235, 32745, 38645, 54575, 72705, 115935, 121175, 163725, 193225, 285973, 363525, 579675, 857919, 1429865, 4289595, 7149325, 21447975]

約数ペア:

[(1, 21447975), (3, 7149325), (5, 4289595), (15, 1429865), (25, 857919), (37, 579675), (59, 363525), (75, 285973), (111, 193225), (131, 163725), (177, 121175), (185, 115935), (295, 72705), (393, 54575), (555, 38645), (655, 32745), (885, 24235), (925, 23187), (1475, 14541), (1965, 10915), (2183, 9825), (2775, 7729), (3275, 6549), (4425, 4847)]