21071284

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{89}}^1\times {\mathrm{157}}^1$

素因数の和:292

約数の個数: 48

約数和(自身を含む): 41806800

約数和(自身を除く): 20735516

約数列:

[1, 2, 4, 13, 26, 29, 52, 58, 89, 116, 157, 178, 314, 356, 377, 628, 754, 1157, 1508, 2041, 2314, 2581, 4082, 4553, 4628, 5162, 8164, 9106, 10324, 13973, 18212, 27946, 33553, 55892, 59189, 67106, 118378, 134212, 181649, 236756, 363298, 405217, 726596, 810434, 1620868, 5267821, 10535642, 21071284]

約数ペア:

[(1, 21071284), (2, 10535642), (4, 5267821), (13, 1620868), (26, 810434), (29, 726596), (52, 405217), (58, 363298), (89, 236756), (116, 181649), (157, 134212), (178, 118378), (314, 67106), (356, 59189), (377, 55892), (628, 33553), (754, 27946), (1157, 18212), (1508, 13973), (2041, 10324), (2314, 9106), (2581, 8164), (4082, 5162), (4553, 4628)]