20809760

素因数分解:

$2^5\times 5^1\times {\mathrm{83}}^1\times {\mathrm{1567}}^1$

素因数の和:1665

約数の個数: 48

約数和(自身を含む): 49787136

約数和(自身を除く): 28977376

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 83, 160, 166, 332, 415, 664, 830, 1328, 1567, 1660, 2656, 3134, 3320, 6268, 6640, 7835, 12536, 13280, 15670, 25072, 31340, 50144, 62680, 125360, 130061, 250720, 260122, 520244, 650305, 1040488, 1300610, 2080976, 2601220, 4161952, 5202440, 10404880, 20809760]

約数ペア:

[(1, 20809760), (2, 10404880), (4, 5202440), (5, 4161952), (8, 2601220), (10, 2080976), (16, 1300610), (20, 1040488), (32, 650305), (40, 520244), (80, 260122), (83, 250720), (160, 130061), (166, 125360), (332, 62680), (415, 50144), (664, 31340), (830, 25072), (1328, 15670), (1567, 13280), (1660, 12536), (2656, 7835), (3134, 6640), (3320, 6268)]