21008984

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{1553}}^1$

素因数の和:1667

約数の個数: 32

約数和(自身を含む): 41958000

約数和(自身を除く): 20949016

約数列:

[1, 2, 4, 8, 19, 38, 76, 89, 152, 178, 356, 712, 1553, 1691, 3106, 3382, 6212, 6764, 12424, 13528, 29507, 59014, 118028, 138217, 236056, 276434, 552868, 1105736, 2626123, 5252246, 10504492, 21008984]

約数ペア:

[(1, 21008984), (2, 10504492), (4, 5252246), (8, 2626123), (19, 1105736), (38, 552868), (76, 276434), (89, 236056), (152, 138217), (178, 118028), (356, 59014), (712, 29507), (1553, 13528), (1691, 12424), (3106, 6764), (3382, 6212)]