15921540

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{197}}^1\times {\mathrm{449}}^1$

素因数の和:661

約数の個数: 72

約数和(自身を含む): 48648600

約数和(自身を除く): 32727060

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 197, 394, 449, 591, 788, 898, 985, 1182, 1347, 1773, 1796, 1970, 2245, 2364, 2694, 2955, 3546, 3940, 4041, 4490, 5388, 5910, 6735, 7092, 8082, 8865, 8980, 11820, 13470, 16164, 17730, 20205, 26940, 35460, 40410, 80820, 88453, 176906, 265359, 353812, 442265, 530718, 796077, 884530, 1061436, 1326795, 1592154, 1769060, 2653590, 3184308, 3980385, 5307180, 7960770, 15921540]

約数ペア:

[(1, 15921540), (2, 7960770), (3, 5307180), (4, 3980385), (5, 3184308), (6, 2653590), (9, 1769060), (10, 1592154), (12, 1326795), (15, 1061436), (18, 884530), (20, 796077), (30, 530718), (36, 442265), (45, 353812), (60, 265359), (90, 176906), (180, 88453), (197, 80820), (394, 40410), (449, 35460), (591, 26940), (788, 20205), (898, 17730), (985, 16164), (1182, 13470), (1347, 11820), (1773, 8980), (1796, 8865), (1970, 8082), (2245, 7092), (2364, 6735), (2694, 5910), (2955, 5388), (3546, 4490), (3940, 4041)]