21986998

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{103}}^1\times {\mathrm{313}}^1$

素因数の和:460

約数の個数: 32

約数和(自身を含む): 37619712

約数和(自身を除く): 15632714

約数列:

[1, 2, 11, 22, 31, 62, 103, 206, 313, 341, 626, 682, 1133, 2266, 3193, 3443, 6386, 6886, 9703, 19406, 32239, 35123, 64478, 70246, 106733, 213466, 354629, 709258, 999409, 1998818, 10993499, 21986998]

約数ペア:

[(1, 21986998), (2, 10993499), (11, 1998818), (22, 999409), (31, 709258), (62, 354629), (103, 213466), (206, 106733), (313, 70246), (341, 64478), (626, 35123), (682, 32239), (1133, 19406), (2266, 9703), (3193, 6886), (3443, 6386)]