1998101780

素因数分解:

$2^2\times 5^1\times {\mathrm{293}}^1\times {\mathrm{349}}^1\times {\mathrm{977}}^1$

素因数の和:1628

約数の個数: 48

約数和(自身を含む): 4226720400

約数和(自身を除く): 2228618620

約数列:

[1, 2, 4, 5, 10, 20, 293, 349, 586, 698, 977, 1172, 1396, 1465, 1745, 1954, 2930, 3490, 3908, 4885, 5860, 6980, 9770, 19540, 102257, 204514, 286261, 340973, 409028, 511285, 572522, 681946, 1022570, 1145044, 1363892, 1431305, 1704865, 2045140, 2862610, 3409730, 5725220, 6819460, 99905089, 199810178, 399620356, 499525445, 999050890, 1998101780]

約数ペア:

[(1, 1998101780), (2, 999050890), (4, 499525445), (5, 399620356), (10, 199810178), (20, 99905089), (293, 6819460), (349, 5725220), (586, 3409730), (698, 2862610), (977, 2045140), (1172, 1704865), (1396, 1431305), (1465, 1363892), (1745, 1145044), (1954, 1022570), (2930, 681946), (3490, 572522), (3908, 511285), (4885, 409028), (5860, 340973), (6980, 286261), (9770, 204514), (19540, 102257)]