20985525

素因数分解:

$3^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{139}}^1$

素因数の和:227

約数の個数: 72

約数和(自身を含む): 41976480

約数和(自身を除く): 20990955

約数列:

[1, 3, 5, 9, 11, 15, 25, 33, 45, 55, 61, 75, 99, 139, 165, 183, 225, 275, 305, 417, 495, 549, 671, 695, 825, 915, 1251, 1525, 1529, 2013, 2085, 2475, 2745, 3355, 3475, 4575, 4587, 6039, 6255, 7645, 8479, 10065, 10425, 13725, 13761, 16775, 22935, 25437, 30195, 31275, 38225, 42395, 50325, 68805, 76311, 93269, 114675, 127185, 150975, 211975, 279807, 344025, 381555, 466345, 635925, 839421, 1399035, 1907775, 2331725, 4197105, 6995175, 20985525]

約数ペア:

[(1, 20985525), (3, 6995175), (5, 4197105), (9, 2331725), (11, 1907775), (15, 1399035), (25, 839421), (33, 635925), (45, 466345), (55, 381555), (61, 344025), (75, 279807), (99, 211975), (139, 150975), (165, 127185), (183, 114675), (225, 93269), (275, 76311), (305, 68805), (417, 50325), (495, 42395), (549, 38225), (671, 31275), (695, 30195), (825, 25437), (915, 22935), (1251, 16775), (1525, 13761), (1529, 13725), (2013, 10425), (2085, 10065), (2475, 8479), (2745, 7645), (3355, 6255), (3475, 6039), (4575, 4587)]