21961940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{1097}}^1$

素因数の和:1137

約数の個数: 96

約数和(自身を含む): 61979904

約数和(自身を除く): 40017964

約数列:

[1, 2, 4, 5, 7, 10, 11, 13, 14, 20, 22, 26, 28, 35, 44, 52, 55, 65, 70, 77, 91, 110, 130, 140, 143, 154, 182, 220, 260, 286, 308, 364, 385, 455, 572, 715, 770, 910, 1001, 1097, 1430, 1540, 1820, 2002, 2194, 2860, 4004, 4388, 5005, 5485, 7679, 10010, 10970, 12067, 14261, 15358, 20020, 21940, 24134, 28522, 30716, 38395, 48268, 57044, 60335, 71305, 76790, 84469, 99827, 120670, 142610, 153580, 156871, 168938, 199654, 241340, 285220, 313742, 337876, 399308, 422345, 499135, 627484, 784355, 844690, 998270, 1098097, 1568710, 1689380, 1996540, 2196194, 3137420, 4392388, 5490485, 10980970, 21961940]

約数ペア:

[(1, 21961940), (2, 10980970), (4, 5490485), (5, 4392388), (7, 3137420), (10, 2196194), (11, 1996540), (13, 1689380), (14, 1568710), (20, 1098097), (22, 998270), (26, 844690), (28, 784355), (35, 627484), (44, 499135), (52, 422345), (55, 399308), (65, 337876), (70, 313742), (77, 285220), (91, 241340), (110, 199654), (130, 168938), (140, 156871), (143, 153580), (154, 142610), (182, 120670), (220, 99827), (260, 84469), (286, 76790), (308, 71305), (364, 60335), (385, 57044), (455, 48268), (572, 38395), (715, 30716), (770, 28522), (910, 24134), (1001, 21940), (1097, 20020), (1430, 15358), (1540, 14261), (1820, 12067), (2002, 10970), (2194, 10010), (2860, 7679), (4004, 5485), (4388, 5005)]