258640

素因数分解:

$2^4\times 5^1\times {\mathrm{53}}^1\times {\mathrm{61}}^1$

素因数の和:127

約数の個数: 40

約数和(自身を含む): 622728

約数和(自身を除く): 364088

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 53, 61, 80, 106, 122, 212, 244, 265, 305, 424, 488, 530, 610, 848, 976, 1060, 1220, 2120, 2440, 3233, 4240, 4880, 6466, 12932, 16165, 25864, 32330, 51728, 64660, 129320, 258640]

約数ペア:

[(1, 258640), (2, 129320), (4, 64660), (5, 51728), (8, 32330), (10, 25864), (16, 16165), (20, 12932), (40, 6466), (53, 4880), (61, 4240), (80, 3233), (106, 2440), (122, 2120), (212, 1220), (244, 1060), (265, 976), (305, 848), (424, 610), (488, 530)]