21182920

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{1553}}^1$

素因数の和:1606

約数の個数: 64

約数和(自身を含む): 53706240

約数和(自身を除く): 32523320

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 31, 40, 44, 55, 62, 88, 110, 124, 155, 220, 248, 310, 341, 440, 620, 682, 1240, 1364, 1553, 1705, 2728, 3106, 3410, 6212, 6820, 7765, 12424, 13640, 15530, 17083, 31060, 34166, 48143, 62120, 68332, 85415, 96286, 136664, 170830, 192572, 240715, 341660, 385144, 481430, 529573, 683320, 962860, 1059146, 1925720, 2118292, 2647865, 4236584, 5295730, 10591460, 21182920]

約数ペア:

[(1, 21182920), (2, 10591460), (4, 5295730), (5, 4236584), (8, 2647865), (10, 2118292), (11, 1925720), (20, 1059146), (22, 962860), (31, 683320), (40, 529573), (44, 481430), (55, 385144), (62, 341660), (88, 240715), (110, 192572), (124, 170830), (155, 136664), (220, 96286), (248, 85415), (310, 68332), (341, 62120), (440, 48143), (620, 34166), (682, 31060), (1240, 17083), (1364, 15530), (1553, 13640), (1705, 12424), (2728, 7765), (3106, 6820), (3410, 6212)]