20274560

素因数分解:

$2^7\times 5^1\times {\mathrm{79}}^1\times {\mathrm{401}}^1$

素因数の和:499

約数の個数: 64

約数和(自身を含む): 49204800

約数和(自身を除く): 28930240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 79, 80, 128, 158, 160, 316, 320, 395, 401, 632, 640, 790, 802, 1264, 1580, 1604, 2005, 2528, 3160, 3208, 4010, 5056, 6320, 6416, 8020, 10112, 12640, 12832, 16040, 25280, 25664, 31679, 32080, 50560, 51328, 63358, 64160, 126716, 128320, 158395, 253432, 256640, 316790, 506864, 633580, 1013728, 1267160, 2027456, 2534320, 4054912, 5068640, 10137280, 20274560]

約数ペア:

[(1, 20274560), (2, 10137280), (4, 5068640), (5, 4054912), (8, 2534320), (10, 2027456), (16, 1267160), (20, 1013728), (32, 633580), (40, 506864), (64, 316790), (79, 256640), (80, 253432), (128, 158395), (158, 128320), (160, 126716), (316, 64160), (320, 63358), (395, 51328), (401, 50560), (632, 32080), (640, 31679), (790, 25664), (802, 25280), (1264, 16040), (1580, 12832), (1604, 12640), (2005, 10112), (2528, 8020), (3160, 6416), (3208, 6320), (4010, 5056)]