21258684

素因数分解:

$2^2\times 3^2\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{443}}^1$

素因数の和:527

約数の個数: 72

約数和(自身を含む): 56888832

約数和(自身を除く): 35630148

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 31, 36, 43, 62, 86, 93, 124, 129, 172, 186, 258, 279, 372, 387, 443, 516, 558, 774, 886, 1116, 1329, 1333, 1548, 1772, 2658, 2666, 3987, 3999, 5316, 5332, 7974, 7998, 11997, 13733, 15948, 15996, 19049, 23994, 27466, 38098, 41199, 47988, 54932, 57147, 76196, 82398, 114294, 123597, 164796, 171441, 228588, 247194, 342882, 494388, 590519, 685764, 1181038, 1771557, 2362076, 3543114, 5314671, 7086228, 10629342, 21258684]

約数ペア:

[(1, 21258684), (2, 10629342), (3, 7086228), (4, 5314671), (6, 3543114), (9, 2362076), (12, 1771557), (18, 1181038), (31, 685764), (36, 590519), (43, 494388), (62, 342882), (86, 247194), (93, 228588), (124, 171441), (129, 164796), (172, 123597), (186, 114294), (258, 82398), (279, 76196), (372, 57147), (387, 54932), (443, 47988), (516, 41199), (558, 38098), (774, 27466), (886, 23994), (1116, 19049), (1329, 15996), (1333, 15948), (1548, 13733), (1772, 11997), (2658, 7998), (2666, 7974), (3987, 5332), (3999, 5316)]