21815300

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{173}}^1$

素因数の和:297

約数の個数: 72

約数和(自身を含む): 51803976

約数和(自身を除く): 29988676

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 97, 100, 130, 173, 194, 260, 325, 346, 388, 485, 650, 692, 865, 970, 1261, 1300, 1730, 1940, 2249, 2425, 2522, 3460, 4325, 4498, 4850, 5044, 6305, 8650, 8996, 9700, 11245, 12610, 16781, 17300, 22490, 25220, 31525, 33562, 44980, 56225, 63050, 67124, 83905, 112450, 126100, 167810, 218153, 224900, 335620, 419525, 436306, 839050, 872612, 1090765, 1678100, 2181530, 4363060, 5453825, 10907650, 21815300]

約数ペア:

[(1, 21815300), (2, 10907650), (4, 5453825), (5, 4363060), (10, 2181530), (13, 1678100), (20, 1090765), (25, 872612), (26, 839050), (50, 436306), (52, 419525), (65, 335620), (97, 224900), (100, 218153), (130, 167810), (173, 126100), (194, 112450), (260, 83905), (325, 67124), (346, 63050), (388, 56225), (485, 44980), (650, 33562), (692, 31525), (865, 25220), (970, 22490), (1261, 17300), (1300, 16781), (1730, 12610), (1940, 11245), (2249, 9700), (2425, 8996), (2522, 8650), (3460, 6305), (4325, 5044), (4498, 4850)]