19969980

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{499}}^1$

素因数の和:563

約数の個数: 96

約数和(自身を含む): 60480000

約数和(自身を除く): 40510020

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 23, 29, 30, 46, 58, 60, 69, 87, 92, 115, 116, 138, 145, 174, 230, 276, 290, 345, 348, 435, 460, 499, 580, 667, 690, 870, 998, 1334, 1380, 1497, 1740, 1996, 2001, 2495, 2668, 2994, 3335, 4002, 4990, 5988, 6670, 7485, 8004, 9980, 10005, 11477, 13340, 14471, 14970, 20010, 22954, 28942, 29940, 34431, 40020, 43413, 45908, 57385, 57884, 68862, 72355, 86826, 114770, 137724, 144710, 172155, 173652, 217065, 229540, 289420, 332833, 344310, 434130, 665666, 688620, 868260, 998499, 1331332, 1664165, 1996998, 3328330, 3993996, 4992495, 6656660, 9984990, 19969980]

約数ペア:

[(1, 19969980), (2, 9984990), (3, 6656660), (4, 4992495), (5, 3993996), (6, 3328330), (10, 1996998), (12, 1664165), (15, 1331332), (20, 998499), (23, 868260), (29, 688620), (30, 665666), (46, 434130), (58, 344310), (60, 332833), (69, 289420), (87, 229540), (92, 217065), (115, 173652), (116, 172155), (138, 144710), (145, 137724), (174, 114770), (230, 86826), (276, 72355), (290, 68862), (345, 57884), (348, 57385), (435, 45908), (460, 43413), (499, 40020), (580, 34431), (667, 29940), (690, 28942), (870, 22954), (998, 20010), (1334, 14970), (1380, 14471), (1497, 13340), (1740, 11477), (1996, 10005), (2001, 9980), (2495, 8004), (2668, 7485), (2994, 6670), (3335, 5988), (4002, 4990)]