19781828

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{419}}^1$

素因数の和:500

約数の個数: 48

約数和(自身を含む): 40219200

約数和(自身を除く): 20437372

約数列:

[1, 2, 4, 11, 22, 29, 37, 44, 58, 74, 116, 148, 319, 407, 419, 638, 814, 838, 1073, 1276, 1628, 1676, 2146, 4292, 4609, 9218, 11803, 12151, 15503, 18436, 23606, 24302, 31006, 47212, 48604, 62012, 133661, 170533, 267322, 341066, 449587, 534644, 682132, 899174, 1798348, 4945457, 9890914, 19781828]

約数ペア:

[(1, 19781828), (2, 9890914), (4, 4945457), (11, 1798348), (22, 899174), (29, 682132), (37, 534644), (44, 449587), (58, 341066), (74, 267322), (116, 170533), (148, 133661), (319, 62012), (407, 48604), (419, 47212), (638, 31006), (814, 24302), (838, 23606), (1073, 18436), (1276, 15503), (1628, 12151), (1676, 11803), (2146, 9218), (4292, 4609)]