201520

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{229}}^1$

素因数の和:253

約数の個数: 40

約数和(自身を含む): 513360

約数和(自身を除く): 311840

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 229, 440, 458, 880, 916, 1145, 1832, 2290, 2519, 3664, 4580, 5038, 9160, 10076, 12595, 18320, 20152, 25190, 40304, 50380, 100760, 201520]

約数ペア:

[(1, 201520), (2, 100760), (4, 50380), (5, 40304), (8, 25190), (10, 20152), (11, 18320), (16, 12595), (20, 10076), (22, 9160), (40, 5038), (44, 4580), (55, 3664), (80, 2519), (88, 2290), (110, 1832), (176, 1145), (220, 916), (229, 880), (440, 458)]