21707820

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{83}}^1\times {\mathrm{1453}}^1$

素因数の和:1551

約数の個数: 72

約数和(自身を含む): 66686256

約数和(自身を除く): 44978436

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 83, 90, 166, 180, 249, 332, 415, 498, 747, 830, 996, 1245, 1453, 1494, 1660, 2490, 2906, 2988, 3735, 4359, 4980, 5812, 7265, 7470, 8718, 13077, 14530, 14940, 17436, 21795, 26154, 29060, 43590, 52308, 65385, 87180, 120599, 130770, 241198, 261540, 361797, 482396, 602995, 723594, 1085391, 1205990, 1447188, 1808985, 2170782, 2411980, 3617970, 4341564, 5426955, 7235940, 10853910, 21707820]

約数ペア:

[(1, 21707820), (2, 10853910), (3, 7235940), (4, 5426955), (5, 4341564), (6, 3617970), (9, 2411980), (10, 2170782), (12, 1808985), (15, 1447188), (18, 1205990), (20, 1085391), (30, 723594), (36, 602995), (45, 482396), (60, 361797), (83, 261540), (90, 241198), (166, 130770), (180, 120599), (249, 87180), (332, 65385), (415, 52308), (498, 43590), (747, 29060), (830, 26154), (996, 21795), (1245, 17436), (1453, 14940), (1494, 14530), (1660, 13077), (2490, 8718), (2906, 7470), (2988, 7265), (3735, 5812), (4359, 4980)]