19991140

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{3343}}^1$

素因数の和:3388

約数の個数: 48

約数和(自身を含む): 47190528

約数和(自身を除く): 27199388

約数列:

[1, 2, 4, 5, 10, 13, 20, 23, 26, 46, 52, 65, 92, 115, 130, 230, 260, 299, 460, 598, 1196, 1495, 2990, 3343, 5980, 6686, 13372, 16715, 33430, 43459, 66860, 76889, 86918, 153778, 173836, 217295, 307556, 384445, 434590, 768890, 869180, 999557, 1537780, 1999114, 3998228, 4997785, 9995570, 19991140]

約数ペア:

[(1, 19991140), (2, 9995570), (4, 4997785), (5, 3998228), (10, 1999114), (13, 1537780), (20, 999557), (23, 869180), (26, 768890), (46, 434590), (52, 384445), (65, 307556), (92, 217295), (115, 173836), (130, 153778), (230, 86918), (260, 76889), (299, 66860), (460, 43459), (598, 33430), (1196, 16715), (1495, 13372), (2990, 6686), (3343, 5980)]