21780724

素因数分解:

$2^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{1091}}^1$

素因数の和:1156

約数の個数: 48

約数和(自身を含む): 46964736

約数和(自身を除く): 25184012

約数列:

[1, 2, 4, 7, 14, 23, 28, 31, 46, 62, 92, 124, 161, 217, 322, 434, 644, 713, 868, 1091, 1426, 2182, 2852, 4364, 4991, 7637, 9982, 15274, 19964, 25093, 30548, 33821, 50186, 67642, 100372, 135284, 175651, 236747, 351302, 473494, 702604, 777883, 946988, 1555766, 3111532, 5445181, 10890362, 21780724]

約数ペア:

[(1, 21780724), (2, 10890362), (4, 5445181), (7, 3111532), (14, 1555766), (23, 946988), (28, 777883), (31, 702604), (46, 473494), (62, 351302), (92, 236747), (124, 175651), (161, 135284), (217, 100372), (322, 67642), (434, 50186), (644, 33821), (713, 30548), (868, 25093), (1091, 19964), (1426, 15274), (2182, 9982), (2852, 7637), (4364, 4991)]