21118980

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{47}}^1\times {\mathrm{7489}}^1$

素因数の和:7548

約数の個数: 48

約数和(自身を含む): 60399360

約数和(自身を除く): 39280380

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 47, 60, 94, 141, 188, 235, 282, 470, 564, 705, 940, 1410, 2820, 7489, 14978, 22467, 29956, 37445, 44934, 74890, 89868, 112335, 149780, 224670, 351983, 449340, 703966, 1055949, 1407932, 1759915, 2111898, 3519830, 4223796, 5279745, 7039660, 10559490, 21118980]

約数ペア:

[(1, 21118980), (2, 10559490), (3, 7039660), (4, 5279745), (5, 4223796), (6, 3519830), (10, 2111898), (12, 1759915), (15, 1407932), (20, 1055949), (30, 703966), (47, 449340), (60, 351983), (94, 224670), (141, 149780), (188, 112335), (235, 89868), (282, 74890), (470, 44934), (564, 37445), (705, 29956), (940, 22467), (1410, 14978), (2820, 7489)]