20868890

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{59}}^1\times {\mathrm{163}}^1$

素因数の和:267

約数の個数: 64

約数和(自身を含む): 45342720

約数和(自身を除く): 24473830

約数列:

[1, 2, 5, 7, 10, 14, 31, 35, 59, 62, 70, 118, 155, 163, 217, 295, 310, 326, 413, 434, 590, 815, 826, 1085, 1141, 1630, 1829, 2065, 2170, 2282, 3658, 4130, 5053, 5705, 9145, 9617, 10106, 11410, 12803, 18290, 19234, 25265, 25606, 35371, 48085, 50530, 64015, 67319, 70742, 96170, 128030, 134638, 176855, 298127, 336595, 353710, 596254, 673190, 1490635, 2086889, 2981270, 4173778, 10434445, 20868890]

約数ペア:

[(1, 20868890), (2, 10434445), (5, 4173778), (7, 2981270), (10, 2086889), (14, 1490635), (31, 673190), (35, 596254), (59, 353710), (62, 336595), (70, 298127), (118, 176855), (155, 134638), (163, 128030), (217, 96170), (295, 70742), (310, 67319), (326, 64015), (413, 50530), (434, 48085), (590, 35371), (815, 25606), (826, 25265), (1085, 19234), (1141, 18290), (1630, 12803), (1829, 11410), (2065, 10106), (2170, 9617), (2282, 9145), (3658, 5705), (4130, 5053)]