221420654

素因数分解:

$2^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{131}}^1\times {\mathrm{251}}^1$

素因数の和:441

約数の個数: 64

約数和(自身を含む): 424714752

約数和(自身を除く): 203294098

約数列:

[1, 2, 7, 13, 14, 26, 37, 74, 91, 131, 182, 251, 259, 262, 481, 502, 518, 917, 962, 1703, 1757, 1834, 3263, 3367, 3406, 3514, 4847, 6526, 6734, 9287, 9694, 11921, 18574, 22841, 23842, 32881, 33929, 45682, 63011, 65009, 65762, 67858, 120731, 126022, 130018, 230167, 241462, 427453, 441077, 460334, 845117, 854906, 882154, 1216597, 1690234, 2433194, 2992171, 5984342, 8516179, 15815761, 17032358, 31631522, 110710327, 221420654]

約数ペア:

[(1, 221420654), (2, 110710327), (7, 31631522), (13, 17032358), (14, 15815761), (26, 8516179), (37, 5984342), (74, 2992171), (91, 2433194), (131, 1690234), (182, 1216597), (251, 882154), (259, 854906), (262, 845117), (481, 460334), (502, 441077), (518, 427453), (917, 241462), (962, 230167), (1703, 130018), (1757, 126022), (1834, 120731), (3263, 67858), (3367, 65762), (3406, 65009), (3514, 63011), (4847, 45682), (6526, 33929), (6734, 32881), (9287, 23842), (9694, 22841), (11921, 18574)]