21580760

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{13159}}^1$

素因数の和:13211

約数の個数: 32

約数和(自身を含む): 49744800

約数和(自身を除く): 28164040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 13159, 26318, 52636, 65795, 105272, 131590, 263180, 526360, 539519, 1079038, 2158076, 2697595, 4316152, 5395190, 10790380, 21580760]

約数ペア:

[(1, 21580760), (2, 10790380), (4, 5395190), (5, 4316152), (8, 2697595), (10, 2158076), (20, 1079038), (40, 539519), (41, 526360), (82, 263180), (164, 131590), (205, 105272), (328, 65795), (410, 52636), (820, 26318), (1640, 13159)]