21182860

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{97}}^1\times {\mathrm{179}}^1$

素因数の和:346

約数の個数: 48

約数和(自身を含む): 45934560

約数和(自身を除く): 24751700

約数列:

[1, 2, 4, 5, 10, 20, 61, 97, 122, 179, 194, 244, 305, 358, 388, 485, 610, 716, 895, 970, 1220, 1790, 1940, 3580, 5917, 10919, 11834, 17363, 21838, 23668, 29585, 34726, 43676, 54595, 59170, 69452, 86815, 109190, 118340, 173630, 218380, 347260, 1059143, 2118286, 4236572, 5295715, 10591430, 21182860]

約数ペア:

[(1, 21182860), (2, 10591430), (4, 5295715), (5, 4236572), (10, 2118286), (20, 1059143), (61, 347260), (97, 218380), (122, 173630), (179, 118340), (194, 109190), (244, 86815), (305, 69452), (358, 59170), (388, 54595), (485, 43676), (610, 34726), (716, 29585), (895, 23668), (970, 21838), (1220, 17363), (1790, 11834), (1940, 10919), (3580, 5917)]