216903981

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{13259}}^1$

素因数の和:13329

約数の個数: 32

約数和(自身を含む): 356428800

約数和(自身を除く): 139524819

約数列:

[1, 3, 7, 19, 21, 41, 57, 123, 133, 287, 399, 779, 861, 2337, 5453, 13259, 16359, 39777, 92813, 251921, 278439, 543619, 755763, 1630857, 1763447, 3805333, 5290341, 10328761, 11415999, 30986283, 72301327, 216903981]

約数ペア:

[(1, 216903981), (3, 72301327), (7, 30986283), (19, 11415999), (21, 10328761), (41, 5290341), (57, 3805333), (123, 1763447), (133, 1630857), (287, 755763), (399, 543619), (779, 278439), (861, 251921), (2337, 92813), (5453, 39777), (13259, 16359)]