18721360

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{101}}^1\times {\mathrm{331}}^1$

素因数の和:452

約数の個数: 80

約数和(自身を含む): 50389632

約数和(自身を除く): 31668272

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 101, 112, 140, 202, 280, 331, 404, 505, 560, 662, 707, 808, 1010, 1324, 1414, 1616, 1655, 2020, 2317, 2648, 2828, 3310, 3535, 4040, 4634, 5296, 5656, 6620, 7070, 8080, 9268, 11312, 11585, 13240, 14140, 18536, 23170, 26480, 28280, 33431, 37072, 46340, 56560, 66862, 92680, 133724, 167155, 185360, 234017, 267448, 334310, 468034, 534896, 668620, 936068, 1170085, 1337240, 1872136, 2340170, 2674480, 3744272, 4680340, 9360680, 18721360]

約数ペア:

[(1, 18721360), (2, 9360680), (4, 4680340), (5, 3744272), (7, 2674480), (8, 2340170), (10, 1872136), (14, 1337240), (16, 1170085), (20, 936068), (28, 668620), (35, 534896), (40, 468034), (56, 334310), (70, 267448), (80, 234017), (101, 185360), (112, 167155), (140, 133724), (202, 92680), (280, 66862), (331, 56560), (404, 46340), (505, 37072), (560, 33431), (662, 28280), (707, 26480), (808, 23170), (1010, 18536), (1324, 14140), (1414, 13240), (1616, 11585), (1655, 11312), (2020, 9268), (2317, 8080), (2648, 7070), (2828, 6620), (3310, 5656), (3535, 5296), (4040, 4634)]