31331979

素因数分解:

$3^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{263}}^1$

素因数の和:368

約数の個数: 48

約数和(自身を含む): 54472704

約数和(自身を除く): 23140725

約数列:

[1, 3, 7, 9, 21, 31, 61, 63, 93, 183, 217, 263, 279, 427, 549, 651, 789, 1281, 1841, 1891, 1953, 2367, 3843, 5523, 5673, 8153, 13237, 16043, 16569, 17019, 24459, 39711, 48129, 57071, 73377, 112301, 119133, 144387, 171213, 336903, 497333, 513639, 1010709, 1491999, 3481331, 4475997, 10443993, 31331979]

約数ペア:

[(1, 31331979), (3, 10443993), (7, 4475997), (9, 3481331), (21, 1491999), (31, 1010709), (61, 513639), (63, 497333), (93, 336903), (183, 171213), (217, 144387), (263, 119133), (279, 112301), (427, 73377), (549, 57071), (651, 48129), (789, 39711), (1281, 24459), (1841, 17019), (1891, 16569), (1953, 16043), (2367, 13237), (3843, 8153), (5523, 5673)]