80210780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{1249}}^1$

素因数の和:1303

約数の個数: 72

約数和(自身を含む): 192150000

約数和(自身を除く): 111939220

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 38, 52, 65, 76, 95, 130, 169, 190, 247, 260, 338, 380, 494, 676, 845, 988, 1235, 1249, 1690, 2470, 2498, 3211, 3380, 4940, 4996, 6245, 6422, 12490, 12844, 16055, 16237, 23731, 24980, 32110, 32474, 47462, 64220, 64948, 81185, 94924, 118655, 162370, 211081, 237310, 308503, 324740, 422162, 474620, 617006, 844324, 1055405, 1234012, 1542515, 2110810, 3085030, 4010539, 4221620, 6170060, 8021078, 16042156, 20052695, 40105390, 80210780]

約数ペア:

[(1, 80210780), (2, 40105390), (4, 20052695), (5, 16042156), (10, 8021078), (13, 6170060), (19, 4221620), (20, 4010539), (26, 3085030), (38, 2110810), (52, 1542515), (65, 1234012), (76, 1055405), (95, 844324), (130, 617006), (169, 474620), (190, 422162), (247, 324740), (260, 308503), (338, 237310), (380, 211081), (494, 162370), (676, 118655), (845, 94924), (988, 81185), (1235, 64948), (1249, 64220), (1690, 47462), (2470, 32474), (2498, 32110), (3211, 24980), (3380, 23731), (4940, 16237), (4996, 16055), (6245, 12844), (6422, 12490)]