18988760

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{929}}^1$

素因数の和:1020

約数の個数: 64

約数和(自身を含む): 49550400

約数和(自身を除く): 30561640

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 73, 140, 146, 280, 292, 365, 511, 584, 730, 929, 1022, 1460, 1858, 2044, 2555, 2920, 3716, 4088, 4645, 5110, 6503, 7432, 9290, 10220, 13006, 18580, 20440, 26012, 32515, 37160, 52024, 65030, 67817, 130060, 135634, 260120, 271268, 339085, 474719, 542536, 678170, 949438, 1356340, 1898876, 2373595, 2712680, 3797752, 4747190, 9494380, 18988760]

約数ペア:

[(1, 18988760), (2, 9494380), (4, 4747190), (5, 3797752), (7, 2712680), (8, 2373595), (10, 1898876), (14, 1356340), (20, 949438), (28, 678170), (35, 542536), (40, 474719), (56, 339085), (70, 271268), (73, 260120), (140, 135634), (146, 130060), (280, 67817), (292, 65030), (365, 52024), (511, 37160), (584, 32515), (730, 26012), (929, 20440), (1022, 18580), (1460, 13006), (1858, 10220), (2044, 9290), (2555, 7432), (2920, 6503), (3716, 5110), (4088, 4645)]