21237678

素因数分解:

$2^1\times 3^2\times 7^2\times {\mathrm{11}}^2\times {\mathrm{199}}^1$

素因数の和:243

約数の個数: 108

約数和(自身を含む): 59131800

約数和(自身を除く): 37894122

約数列:

[1, 2, 3, 6, 7, 9, 11, 14, 18, 21, 22, 33, 42, 49, 63, 66, 77, 98, 99, 121, 126, 147, 154, 198, 199, 231, 242, 294, 363, 398, 441, 462, 539, 597, 693, 726, 847, 882, 1078, 1089, 1194, 1386, 1393, 1617, 1694, 1791, 2178, 2189, 2541, 2786, 3234, 3582, 4179, 4378, 4851, 5082, 5929, 6567, 7623, 8358, 9702, 9751, 11858, 12537, 13134, 15246, 15323, 17787, 19502, 19701, 24079, 25074, 29253, 30646, 35574, 39402, 45969, 48158, 53361, 58506, 72237, 87759, 91938, 106722, 107261, 137907, 144474, 168553, 175518, 214522, 216711, 275814, 321783, 337106, 433422, 505659, 643566, 965349, 1011318, 1179871, 1516977, 1930698, 2359742, 3033954, 3539613, 7079226, 10618839, 21237678]

約数ペア:

[(1, 21237678), (2, 10618839), (3, 7079226), (6, 3539613), (7, 3033954), (9, 2359742), (11, 1930698), (14, 1516977), (18, 1179871), (21, 1011318), (22, 965349), (33, 643566), (42, 505659), (49, 433422), (63, 337106), (66, 321783), (77, 275814), (98, 216711), (99, 214522), (121, 175518), (126, 168553), (147, 144474), (154, 137907), (198, 107261), (199, 106722), (231, 91938), (242, 87759), (294, 72237), (363, 58506), (398, 53361), (441, 48158), (462, 45969), (539, 39402), (597, 35574), (693, 30646), (726, 29253), (847, 25074), (882, 24079), (1078, 19701), (1089, 19502), (1194, 17787), (1386, 15323), (1393, 15246), (1617, 13134), (1694, 12537), (1791, 11858), (2178, 9751), (2189, 9702), (2541, 8358), (2786, 7623), (3234, 6567), (3582, 5929), (4179, 5082), (4378, 4851)]