20199499160

素因数分解:

$2^3\times 5^1\times {\mathrm{997}}^1\times {\mathrm{506507}}^1$

素因数の和:507515

約数の個数: 32

約数和(自身を含む): 45494548560

約数和(自身を除く): 25295049400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 997, 1994, 3988, 4985, 7976, 9970, 19940, 39880, 506507, 1013014, 2026028, 2532535, 4052056, 5065070, 10130140, 20260280, 504987479, 1009974958, 2019949916, 2524937395, 4039899832, 5049874790, 10099749580, 20199499160]

約数ペア:

[(1, 20199499160), (2, 10099749580), (4, 5049874790), (5, 4039899832), (8, 2524937395), (10, 2019949916), (20, 1009974958), (40, 504987479), (997, 20260280), (1994, 10130140), (3988, 5065070), (4985, 4052056), (7976, 2532535), (9970, 2026028), (19940, 1013014), (39880, 506507)]