20397420

素因数分解:

$2^2\times 3^6\times 5^1\times {\mathrm{1399}}^1$

素因数の和:1426

約数の個数: 84

約数和(自身を含む): 64268400

約数和(自身を除く): 43870980

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, 1399, 1458, 1620, 2430, 2798, 2916, 3645, 4197, 4860, 5596, 6995, 7290, 8394, 12591, 13990, 14580, 16788, 20985, 25182, 27980, 37773, 41970, 50364, 62955, 75546, 83940, 113319, 125910, 151092, 188865, 226638, 251820, 339957, 377730, 453276, 566595, 679914, 755460, 1019871, 1133190, 1359828, 1699785, 2039742, 2266380, 3399570, 4079484, 5099355, 6799140, 10198710, 20397420]

約数ペア:

[(1, 20397420), (2, 10198710), (3, 6799140), (4, 5099355), (5, 4079484), (6, 3399570), (9, 2266380), (10, 2039742), (12, 1699785), (15, 1359828), (18, 1133190), (20, 1019871), (27, 755460), (30, 679914), (36, 566595), (45, 453276), (54, 377730), (60, 339957), (81, 251820), (90, 226638), (108, 188865), (135, 151092), (162, 125910), (180, 113319), (243, 83940), (270, 75546), (324, 62955), (405, 50364), (486, 41970), (540, 37773), (729, 27980), (810, 25182), (972, 20985), (1215, 16788), (1399, 14580), (1458, 13990), (1620, 12591), (2430, 8394), (2798, 7290), (2916, 6995), (3645, 5596), (4197, 4860)]