21098253

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1\times {\mathrm{223}}^1$

素因数の和:345

約数の個数: 32

約数和(自身を含む): 31997952

約数和(自身を除く): 10899699

約数列:

[1, 3, 11, 33, 47, 61, 141, 183, 223, 517, 669, 671, 1551, 2013, 2453, 2867, 7359, 8601, 10481, 13603, 31443, 31537, 40809, 94611, 115291, 149633, 345873, 448899, 639341, 1918023, 7032751, 21098253]

約数ペア:

[(1, 21098253), (3, 7032751), (11, 1918023), (33, 639341), (47, 448899), (61, 345873), (141, 149633), (183, 115291), (223, 94611), (517, 40809), (669, 31537), (671, 31443), (1551, 13603), (2013, 10481), (2453, 8601), (2867, 7359)]