398156680

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{457}}^1\times {\mathrm{947}}^1$

素因数の和:1438

約数の個数: 64

約数和(自身を含む): 937837440

約数和(自身を除く): 539680760

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 92, 115, 184, 230, 457, 460, 914, 920, 947, 1828, 1894, 2285, 3656, 3788, 4570, 4735, 7576, 9140, 9470, 10511, 18280, 18940, 21022, 21781, 37880, 42044, 43562, 52555, 84088, 87124, 105110, 108905, 174248, 210220, 217810, 420440, 432779, 435620, 865558, 871240, 1731116, 2163895, 3462232, 4327790, 8655580, 9953917, 17311160, 19907834, 39815668, 49769585, 79631336, 99539170, 199078340, 398156680]

約数ペア:

[(1, 398156680), (2, 199078340), (4, 99539170), (5, 79631336), (8, 49769585), (10, 39815668), (20, 19907834), (23, 17311160), (40, 9953917), (46, 8655580), (92, 4327790), (115, 3462232), (184, 2163895), (230, 1731116), (457, 871240), (460, 865558), (914, 435620), (920, 432779), (947, 420440), (1828, 217810), (1894, 210220), (2285, 174248), (3656, 108905), (3788, 105110), (4570, 87124), (4735, 84088), (7576, 52555), (9140, 43562), (9470, 42044), (10511, 37880), (18280, 21781), (18940, 21022)]