21855420

素因数分解:

$2^2\times 3^6\times 5^1\times {\mathrm{1499}}^1$

素因数の和:1526

約数の個数: 84

約数和(自身を含む): 68859000

約数和(自身を除く): 47003580

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 81, 90, 108, 135, 162, 180, 243, 270, 324, 405, 486, 540, 729, 810, 972, 1215, 1458, 1499, 1620, 2430, 2916, 2998, 3645, 4497, 4860, 5996, 7290, 7495, 8994, 13491, 14580, 14990, 17988, 22485, 26982, 29980, 40473, 44970, 53964, 67455, 80946, 89940, 121419, 134910, 161892, 202365, 242838, 269820, 364257, 404730, 485676, 607095, 728514, 809460, 1092771, 1214190, 1457028, 1821285, 2185542, 2428380, 3642570, 4371084, 5463855, 7285140, 10927710, 21855420]

約数ペア:

[(1, 21855420), (2, 10927710), (3, 7285140), (4, 5463855), (5, 4371084), (6, 3642570), (9, 2428380), (10, 2185542), (12, 1821285), (15, 1457028), (18, 1214190), (20, 1092771), (27, 809460), (30, 728514), (36, 607095), (45, 485676), (54, 404730), (60, 364257), (81, 269820), (90, 242838), (108, 202365), (135, 161892), (162, 134910), (180, 121419), (243, 89940), (270, 80946), (324, 67455), (405, 53964), (486, 44970), (540, 40473), (729, 29980), (810, 26982), (972, 22485), (1215, 17988), (1458, 14990), (1499, 14580), (1620, 13491), (2430, 8994), (2916, 7495), (2998, 7290), (3645, 5996), (4497, 4860)]