20722220

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{683}}^1$

素因数の和:770

約数の個数: 48

約数和(自身を含む): 45849888

約数和(自身を除く): 25127668

約数列:

[1, 2, 4, 5, 10, 20, 37, 41, 74, 82, 148, 164, 185, 205, 370, 410, 683, 740, 820, 1366, 1517, 2732, 3034, 3415, 6068, 6830, 7585, 13660, 15170, 25271, 28003, 30340, 50542, 56006, 101084, 112012, 126355, 140015, 252710, 280030, 505420, 560060, 1036111, 2072222, 4144444, 5180555, 10361110, 20722220]

約数ペア:

[(1, 20722220), (2, 10361110), (4, 5180555), (5, 4144444), (10, 2072222), (20, 1036111), (37, 560060), (41, 505420), (74, 280030), (82, 252710), (148, 140015), (164, 126355), (185, 112012), (205, 101084), (370, 56006), (410, 50542), (683, 30340), (740, 28003), (820, 25271), (1366, 15170), (1517, 13660), (2732, 7585), (3034, 6830), (3415, 6068)]