18990998

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{89}}^1\times {\mathrm{283}}^1$

素因数の和:416

約数の個数: 32

約数和(自身を含む): 32205600

約数和(自身を除く): 13214602

約数列:

[1, 2, 13, 26, 29, 58, 89, 178, 283, 377, 566, 754, 1157, 2314, 2581, 3679, 5162, 7358, 8207, 16414, 25187, 33553, 50374, 67106, 106691, 213382, 327431, 654862, 730423, 1460846, 9495499, 18990998]

約数ペア:

[(1, 18990998), (2, 9495499), (13, 1460846), (26, 730423), (29, 654862), (58, 327431), (89, 213382), (178, 106691), (283, 67106), (377, 50374), (566, 33553), (754, 25187), (1157, 16414), (2314, 8207), (2581, 7358), (3679, 5162)]