11981988

素因数分解:

$2^2\times 3^2\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{499}}^1$

素因数の和:561

約数の個数: 72

約数和(自身を含む): 32760000

約数和(自身を除く): 20778012

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 23, 29, 36, 46, 58, 69, 87, 92, 116, 138, 174, 207, 261, 276, 348, 414, 499, 522, 667, 828, 998, 1044, 1334, 1497, 1996, 2001, 2668, 2994, 4002, 4491, 5988, 6003, 8004, 8982, 11477, 12006, 14471, 17964, 22954, 24012, 28942, 34431, 43413, 45908, 57884, 68862, 86826, 103293, 130239, 137724, 173652, 206586, 260478, 332833, 413172, 520956, 665666, 998499, 1331332, 1996998, 2995497, 3993996, 5990994, 11981988]

約数ペア:

[(1, 11981988), (2, 5990994), (3, 3993996), (4, 2995497), (6, 1996998), (9, 1331332), (12, 998499), (18, 665666), (23, 520956), (29, 413172), (36, 332833), (46, 260478), (58, 206586), (69, 173652), (87, 137724), (92, 130239), (116, 103293), (138, 86826), (174, 68862), (207, 57884), (261, 45908), (276, 43413), (348, 34431), (414, 28942), (499, 24012), (522, 22954), (667, 17964), (828, 14471), (998, 12006), (1044, 11477), (1334, 8982), (1497, 8004), (1996, 6003), (2001, 5988), (2668, 4491), (2994, 4002)]