261393225

素因数分解:

$3^1\times 5^2\times {\mathrm{79}}^1\times {\mathrm{157}}^1\times {\mathrm{281}}^1$

素因数の和:530

約数の個数: 48

約数和(自身を含む): 441995520

約数和(自身を除く): 180602295

約数列:

[1, 3, 5, 15, 25, 75, 79, 157, 237, 281, 395, 471, 785, 843, 1185, 1405, 1975, 2355, 3925, 4215, 5925, 7025, 11775, 12403, 21075, 22199, 37209, 44117, 62015, 66597, 110995, 132351, 186045, 220585, 310075, 332985, 554975, 661755, 930225, 1102925, 1664925, 3308775, 3485243, 10455729, 17426215, 52278645, 87131075, 261393225]

約数ペア:

[(1, 261393225), (3, 87131075), (5, 52278645), (15, 17426215), (25, 10455729), (75, 3485243), (79, 3308775), (157, 1664925), (237, 1102925), (281, 930225), (395, 661755), (471, 554975), (785, 332985), (843, 310075), (1185, 220585), (1405, 186045), (1975, 132351), (2355, 110995), (3925, 66597), (4215, 62015), (5925, 44117), (7025, 37209), (11775, 22199), (12403, 21075)]