20643760

素因数分解:

$2^4\times 5^1\times {\mathrm{83}}^1\times {\mathrm{3109}}^1$

素因数の和:3205

約数の個数: 40

約数和(自身を含む): 48590640

約数和(自身を除く): 27946880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 83, 166, 332, 415, 664, 830, 1328, 1660, 3109, 3320, 6218, 6640, 12436, 15545, 24872, 31090, 49744, 62180, 124360, 248720, 258047, 516094, 1032188, 1290235, 2064376, 2580470, 4128752, 5160940, 10321880, 20643760]

約数ペア:

[(1, 20643760), (2, 10321880), (4, 5160940), (5, 4128752), (8, 2580470), (10, 2064376), (16, 1290235), (20, 1032188), (40, 516094), (80, 258047), (83, 248720), (166, 124360), (332, 62180), (415, 49744), (664, 31090), (830, 24872), (1328, 15545), (1660, 12436), (3109, 6640), (3320, 6218)]