21223280

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{20407}}^1$

素因数の和:20433

約数の個数: 40

約数和(自身を含む): 53142432

約数和(自身を除く): 31919152

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 20407, 40814, 81628, 102035, 163256, 204070, 265291, 326512, 408140, 530582, 816280, 1061164, 1326455, 1632560, 2122328, 2652910, 4244656, 5305820, 10611640, 21223280]

約数ペア:

[(1, 21223280), (2, 10611640), (4, 5305820), (5, 4244656), (8, 2652910), (10, 2122328), (13, 1632560), (16, 1326455), (20, 1061164), (26, 816280), (40, 530582), (52, 408140), (65, 326512), (80, 265291), (104, 204070), (130, 163256), (208, 102035), (260, 81628), (520, 40814), (1040, 20407)]