21565040

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{97}}^1\times {\mathrm{397}}^1$

素因数の和:514

約数の個数: 80

約数和(自身を含む): 58037952

約数和(自身を除く): 36472912

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 97, 112, 140, 194, 280, 388, 397, 485, 560, 679, 776, 794, 970, 1358, 1552, 1588, 1940, 1985, 2716, 2779, 3176, 3395, 3880, 3970, 5432, 5558, 6352, 6790, 7760, 7940, 10864, 11116, 13580, 13895, 15880, 22232, 27160, 27790, 31760, 38509, 44464, 54320, 55580, 77018, 111160, 154036, 192545, 222320, 269563, 308072, 385090, 539126, 616144, 770180, 1078252, 1347815, 1540360, 2156504, 2695630, 3080720, 4313008, 5391260, 10782520, 21565040]

約数ペア:

[(1, 21565040), (2, 10782520), (4, 5391260), (5, 4313008), (7, 3080720), (8, 2695630), (10, 2156504), (14, 1540360), (16, 1347815), (20, 1078252), (28, 770180), (35, 616144), (40, 539126), (56, 385090), (70, 308072), (80, 269563), (97, 222320), (112, 192545), (140, 154036), (194, 111160), (280, 77018), (388, 55580), (397, 54320), (485, 44464), (560, 38509), (679, 31760), (776, 27790), (794, 27160), (970, 22232), (1358, 15880), (1552, 13895), (1588, 13580), (1940, 11116), (1985, 10864), (2716, 7940), (2779, 7760), (3176, 6790), (3395, 6352), (3880, 5558), (3970, 5432)]