21490875

素因数分解:

$3^2\times 5^3\times 7^1\times {\mathrm{2729}}^1$

素因数の和:2757

約数の個数: 48

約数和(自身を含む): 44291520

約数和(自身を除く): 22800645

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 35, 45, 63, 75, 105, 125, 175, 225, 315, 375, 525, 875, 1125, 1575, 2625, 2729, 7875, 8187, 13645, 19103, 24561, 40935, 57309, 68225, 95515, 122805, 171927, 204675, 286545, 341125, 477575, 614025, 859635, 1023375, 1432725, 2387875, 3070125, 4298175, 7163625, 21490875]

約数ペア:

[(1, 21490875), (3, 7163625), (5, 4298175), (7, 3070125), (9, 2387875), (15, 1432725), (21, 1023375), (25, 859635), (35, 614025), (45, 477575), (63, 341125), (75, 286545), (105, 204675), (125, 171927), (175, 122805), (225, 95515), (315, 68225), (375, 57309), (525, 40935), (875, 24561), (1125, 19103), (1575, 13645), (2625, 8187), (2729, 7875)]