21578140

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{769}}^1$

素因数の和:862

約数の個数: 48

約数和(自身を含む): 48121920

約数和(自身を除く): 26543780

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 61, 92, 115, 122, 230, 244, 305, 460, 610, 769, 1220, 1403, 1538, 2806, 3076, 3845, 5612, 7015, 7690, 14030, 15380, 17687, 28060, 35374, 46909, 70748, 88435, 93818, 176870, 187636, 234545, 353740, 469090, 938180, 1078907, 2157814, 4315628, 5394535, 10789070, 21578140]

約数ペア:

[(1, 21578140), (2, 10789070), (4, 5394535), (5, 4315628), (10, 2157814), (20, 1078907), (23, 938180), (46, 469090), (61, 353740), (92, 234545), (115, 187636), (122, 176870), (230, 93818), (244, 88435), (305, 70748), (460, 46909), (610, 35374), (769, 28060), (1220, 17687), (1403, 15380), (1538, 14030), (2806, 7690), (3076, 7015), (3845, 5612)]