20763280

素因数分解:

$2^4\times 5^1\times {\mathrm{53}}^1\times {\mathrm{59}}^1\times {\mathrm{83}}^1$

素因数の和:208

約数の個数: 80

約数和(自身を含む): 50621760

約数和(自身を除く): 29858480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 53, 59, 80, 83, 106, 118, 166, 212, 236, 265, 295, 332, 415, 424, 472, 530, 590, 664, 830, 848, 944, 1060, 1180, 1328, 1660, 2120, 2360, 3127, 3320, 4240, 4399, 4720, 4897, 6254, 6640, 8798, 9794, 12508, 15635, 17596, 19588, 21995, 24485, 25016, 31270, 35192, 39176, 43990, 48970, 50032, 62540, 70384, 78352, 87980, 97940, 125080, 175960, 195880, 250160, 259541, 351920, 391760, 519082, 1038164, 1297705, 2076328, 2595410, 4152656, 5190820, 10381640, 20763280]

約数ペア:

[(1, 20763280), (2, 10381640), (4, 5190820), (5, 4152656), (8, 2595410), (10, 2076328), (16, 1297705), (20, 1038164), (40, 519082), (53, 391760), (59, 351920), (80, 259541), (83, 250160), (106, 195880), (118, 175960), (166, 125080), (212, 97940), (236, 87980), (265, 78352), (295, 70384), (332, 62540), (415, 50032), (424, 48970), (472, 43990), (530, 39176), (590, 35192), (664, 31270), (830, 25016), (848, 24485), (944, 21995), (1060, 19588), (1180, 17596), (1328, 15635), (1660, 12508), (2120, 9794), (2360, 8798), (3127, 6640), (3320, 6254), (4240, 4897), (4399, 4720)]