21153860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{197}}^1$

素因数の和:285

約数の個数: 96

約数和(自身を含む): 55883520

約数和(自身を除く): 34729660

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 59, 65, 70, 91, 118, 130, 140, 182, 197, 236, 260, 295, 364, 394, 413, 455, 590, 767, 788, 826, 910, 985, 1180, 1379, 1534, 1652, 1820, 1970, 2065, 2561, 2758, 3068, 3835, 3940, 4130, 5122, 5369, 5516, 6895, 7670, 8260, 10244, 10738, 11623, 12805, 13790, 15340, 17927, 21476, 23246, 25610, 26845, 27580, 35854, 46492, 51220, 53690, 58115, 71708, 81361, 89635, 107380, 116230, 151099, 162722, 179270, 232460, 302198, 325444, 358540, 406805, 604396, 755495, 813610, 1057693, 1510990, 1627220, 2115386, 3021980, 4230772, 5288465, 10576930, 21153860]

約数ペア:

[(1, 21153860), (2, 10576930), (4, 5288465), (5, 4230772), (7, 3021980), (10, 2115386), (13, 1627220), (14, 1510990), (20, 1057693), (26, 813610), (28, 755495), (35, 604396), (52, 406805), (59, 358540), (65, 325444), (70, 302198), (91, 232460), (118, 179270), (130, 162722), (140, 151099), (182, 116230), (197, 107380), (236, 89635), (260, 81361), (295, 71708), (364, 58115), (394, 53690), (413, 51220), (455, 46492), (590, 35854), (767, 27580), (788, 26845), (826, 25610), (910, 23246), (985, 21476), (1180, 17927), (1379, 15340), (1534, 13790), (1652, 12805), (1820, 11623), (1970, 10738), (2065, 10244), (2561, 8260), (2758, 7670), (3068, 6895), (3835, 5516), (3940, 5369), (4130, 5122)]