18980145

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{281}}^1$

素因数の和:390

約数の個数: 48

約数和(自身を含む): 35193600

約数和(自身を除く): 16213455

約数列:

[1, 3, 5, 9, 15, 19, 45, 57, 79, 95, 171, 237, 281, 285, 395, 711, 843, 855, 1185, 1405, 1501, 2529, 3555, 4215, 4503, 5339, 7505, 12645, 13509, 16017, 22199, 22515, 26695, 48051, 66597, 67545, 80085, 110995, 199791, 240255, 332985, 421781, 998955, 1265343, 2108905, 3796029, 6326715, 18980145]

約数ペア:

[(1, 18980145), (3, 6326715), (5, 3796029), (9, 2108905), (15, 1265343), (19, 998955), (45, 421781), (57, 332985), (79, 240255), (95, 199791), (171, 110995), (237, 80085), (281, 67545), (285, 66597), (395, 48051), (711, 26695), (843, 22515), (855, 22199), (1185, 16017), (1405, 13509), (1501, 12645), (2529, 7505), (3555, 5339), (4215, 4503)]