218213751

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{223}}^1\times {\mathrm{2741}}^1$

素因数の和:2991

約数の個数: 32

約数和(自身を含む): 353783808

約数和(自身を除く): 135570057

約数列:

[1, 3, 7, 17, 21, 51, 119, 223, 357, 669, 1561, 2741, 3791, 4683, 8223, 11373, 19187, 26537, 46597, 57561, 79611, 139791, 326179, 611243, 978537, 1833729, 4278701, 10391131, 12836103, 31173393, 72737917, 218213751]

約数ペア:

[(1, 218213751), (3, 72737917), (7, 31173393), (17, 12836103), (21, 10391131), (51, 4278701), (119, 1833729), (223, 978537), (357, 611243), (669, 326179), (1561, 139791), (2741, 79611), (3791, 57561), (4683, 46597), (8223, 26537), (11373, 19187)]