21235725

素因数分解:

$3^2\times 5^2\times 7^1\times {\mathrm{97}}^1\times {\mathrm{139}}^1$

素因数の和:259

約数の個数: 72

約数和(自身を含む): 44233280

約数和(自身を除く): 22997555

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 35, 45, 63, 75, 97, 105, 139, 175, 225, 291, 315, 417, 485, 525, 679, 695, 873, 973, 1251, 1455, 1575, 2037, 2085, 2425, 2919, 3395, 3475, 4365, 4865, 6111, 6255, 7275, 8757, 10185, 10425, 13483, 14595, 16975, 21825, 24325, 30555, 31275, 40449, 43785, 50925, 67415, 72975, 94381, 121347, 152775, 202245, 218925, 283143, 337075, 471905, 606735, 849429, 1011225, 1415715, 2359525, 3033675, 4247145, 7078575, 21235725]

約数ペア:

[(1, 21235725), (3, 7078575), (5, 4247145), (7, 3033675), (9, 2359525), (15, 1415715), (21, 1011225), (25, 849429), (35, 606735), (45, 471905), (63, 337075), (75, 283143), (97, 218925), (105, 202245), (139, 152775), (175, 121347), (225, 94381), (291, 72975), (315, 67415), (417, 50925), (485, 43785), (525, 40449), (679, 31275), (695, 30555), (873, 24325), (973, 21825), (1251, 16975), (1455, 14595), (1575, 13483), (2037, 10425), (2085, 10185), (2425, 8757), (2919, 7275), (3395, 6255), (3475, 6111), (4365, 4865)]