21222736

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{109}}^1\times {\mathrm{283}}^1$

素因数の和:443

約数の個数: 40

約数和(自身を含む): 42611360

約数和(自身を除く): 21388624

約数列:

[1, 2, 4, 8, 16, 43, 86, 109, 172, 218, 283, 344, 436, 566, 688, 872, 1132, 1744, 2264, 4528, 4687, 9374, 12169, 18748, 24338, 30847, 37496, 48676, 61694, 74992, 97352, 123388, 194704, 246776, 493552, 1326421, 2652842, 5305684, 10611368, 21222736]

約数ペア:

[(1, 21222736), (2, 10611368), (4, 5305684), (8, 2652842), (16, 1326421), (43, 493552), (86, 246776), (109, 194704), (172, 123388), (218, 97352), (283, 74992), (344, 61694), (436, 48676), (566, 37496), (688, 30847), (872, 24338), (1132, 18748), (1744, 12169), (2264, 9374), (4528, 4687)]