20661664

素因数分解:

$2^5\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{1999}}^1$

素因数の和:2045

約数の個数: 48

約数和(自身を含む): 45360000

約数和(自身を除く): 24698336

約数列:

[1, 2, 4, 8, 16, 17, 19, 32, 34, 38, 68, 76, 136, 152, 272, 304, 323, 544, 608, 646, 1292, 1999, 2584, 3998, 5168, 7996, 10336, 15992, 31984, 33983, 37981, 63968, 67966, 75962, 135932, 151924, 271864, 303848, 543728, 607696, 645677, 1087456, 1215392, 1291354, 2582708, 5165416, 10330832, 20661664]

約数ペア:

[(1, 20661664), (2, 10330832), (4, 5165416), (8, 2582708), (16, 1291354), (17, 1215392), (19, 1087456), (32, 645677), (34, 607696), (38, 543728), (68, 303848), (76, 271864), (136, 151924), (152, 135932), (272, 75962), (304, 67966), (323, 63968), (544, 37981), (608, 33983), (646, 31984), (1292, 15992), (1999, 10336), (2584, 7996), (3998, 5168)]