19801040

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{1861}}^1$

素因数の和:1900

約数の個数: 80

約数和(自身を含む): 55413120

約数和(自身を除く): 35612080

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 19, 20, 28, 35, 38, 40, 56, 70, 76, 80, 95, 112, 133, 140, 152, 190, 266, 280, 304, 380, 532, 560, 665, 760, 1064, 1330, 1520, 1861, 2128, 2660, 3722, 5320, 7444, 9305, 10640, 13027, 14888, 18610, 26054, 29776, 35359, 37220, 52108, 65135, 70718, 74440, 104216, 130270, 141436, 148880, 176795, 208432, 247513, 260540, 282872, 353590, 495026, 521080, 565744, 707180, 990052, 1042160, 1237565, 1414360, 1980104, 2475130, 2828720, 3960208, 4950260, 9900520, 19801040]

約数ペア:

[(1, 19801040), (2, 9900520), (4, 4950260), (5, 3960208), (7, 2828720), (8, 2475130), (10, 1980104), (14, 1414360), (16, 1237565), (19, 1042160), (20, 990052), (28, 707180), (35, 565744), (38, 521080), (40, 495026), (56, 353590), (70, 282872), (76, 260540), (80, 247513), (95, 208432), (112, 176795), (133, 148880), (140, 141436), (152, 130270), (190, 104216), (266, 74440), (280, 70718), (304, 65135), (380, 52108), (532, 37220), (560, 35359), (665, 29776), (760, 26054), (1064, 18610), (1330, 14888), (1520, 13027), (1861, 10640), (2128, 9305), (2660, 7444), (3722, 5320)]