20287120

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{2131}}^1$

素因数の和:2168

約数の個数: 80

約数和(自身を含む): 57103488

約数和(自身を除く): 36816368

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 17, 20, 28, 34, 35, 40, 56, 68, 70, 80, 85, 112, 119, 136, 140, 170, 238, 272, 280, 340, 476, 560, 595, 680, 952, 1190, 1360, 1904, 2131, 2380, 4262, 4760, 8524, 9520, 10655, 14917, 17048, 21310, 29834, 34096, 36227, 42620, 59668, 72454, 74585, 85240, 119336, 144908, 149170, 170480, 181135, 238672, 253589, 289816, 298340, 362270, 507178, 579632, 596680, 724540, 1014356, 1193360, 1267945, 1449080, 2028712, 2535890, 2898160, 4057424, 5071780, 10143560, 20287120]

約数ペア:

[(1, 20287120), (2, 10143560), (4, 5071780), (5, 4057424), (7, 2898160), (8, 2535890), (10, 2028712), (14, 1449080), (16, 1267945), (17, 1193360), (20, 1014356), (28, 724540), (34, 596680), (35, 579632), (40, 507178), (56, 362270), (68, 298340), (70, 289816), (80, 253589), (85, 238672), (112, 181135), (119, 170480), (136, 149170), (140, 144908), (170, 119336), (238, 85240), (272, 74585), (280, 72454), (340, 59668), (476, 42620), (560, 36227), (595, 34096), (680, 29834), (952, 21310), (1190, 17048), (1360, 14917), (1904, 10655), (2131, 9520), (2380, 8524), (4262, 4760)]