21059820

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{1481}}^1$

素因数の和:1575

約数の個数: 72

約数和(自身を含む): 64733760

約数和(自身を除く): 43673940

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 79, 90, 158, 180, 237, 316, 395, 474, 711, 790, 948, 1185, 1422, 1481, 1580, 2370, 2844, 2962, 3555, 4443, 4740, 5924, 7110, 7405, 8886, 13329, 14220, 14810, 17772, 22215, 26658, 29620, 44430, 53316, 66645, 88860, 116999, 133290, 233998, 266580, 350997, 467996, 584995, 701994, 1052991, 1169990, 1403988, 1754985, 2105982, 2339980, 3509970, 4211964, 5264955, 7019940, 10529910, 21059820]

約数ペア:

[(1, 21059820), (2, 10529910), (3, 7019940), (4, 5264955), (5, 4211964), (6, 3509970), (9, 2339980), (10, 2105982), (12, 1754985), (15, 1403988), (18, 1169990), (20, 1052991), (30, 701994), (36, 584995), (45, 467996), (60, 350997), (79, 266580), (90, 233998), (158, 133290), (180, 116999), (237, 88860), (316, 66645), (395, 53316), (474, 44430), (711, 29620), (790, 26658), (948, 22215), (1185, 17772), (1422, 14810), (1481, 14220), (1580, 13329), (2370, 8886), (2844, 7405), (2962, 7110), (3555, 5924), (4443, 4740)]