21167575

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{191}}^1$

素因数の和:256

約数の個数: 48

約数和(自身を含む): 31997952

約数和(自身を除く): 10830377

約数列:

[1, 5, 11, 13, 25, 31, 55, 65, 143, 155, 191, 275, 325, 341, 403, 715, 775, 955, 1705, 2015, 2101, 2483, 3575, 4433, 4775, 5921, 8525, 10075, 10505, 12415, 22165, 27313, 29605, 52525, 62075, 65131, 76973, 110825, 136565, 148025, 325655, 384865, 682825, 846703, 1628275, 1924325, 4233515, 21167575]

約数ペア:

[(1, 21167575), (5, 4233515), (11, 1924325), (13, 1628275), (25, 846703), (31, 682825), (55, 384865), (65, 325655), (143, 148025), (155, 136565), (191, 110825), (275, 76973), (325, 65131), (341, 62075), (403, 52525), (715, 29605), (775, 27313), (955, 22165), (1705, 12415), (2015, 10505), (2101, 10075), (2483, 8525), (3575, 5921), (4433, 4775)]