19899140

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{181}}^1\times {\mathrm{239}}^1$

素因数の和:452

約数の個数: 48

約数和(自身を含む): 44029440

約数和(自身を除く): 24130300

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 92, 115, 181, 230, 239, 362, 460, 478, 724, 905, 956, 1195, 1810, 2390, 3620, 4163, 4780, 5497, 8326, 10994, 16652, 20815, 21988, 27485, 41630, 43259, 54970, 83260, 86518, 109940, 173036, 216295, 432590, 865180, 994957, 1989914, 3979828, 4974785, 9949570, 19899140]

約数ペア:

[(1, 19899140), (2, 9949570), (4, 4974785), (5, 3979828), (10, 1989914), (20, 994957), (23, 865180), (46, 432590), (92, 216295), (115, 173036), (181, 109940), (230, 86518), (239, 83260), (362, 54970), (460, 43259), (478, 41630), (724, 27485), (905, 21988), (956, 20815), (1195, 16652), (1810, 10994), (2390, 8326), (3620, 5497), (4163, 4780)]