20998250

素因数分解:

$2^1\times 5^3\times 7^1\times {\mathrm{13}}^2\times {\mathrm{71}}^1$

素因数の和:121

約数の個数: 96

約数和(自身を含む): 49330944

約数和(自身を除く): 28332694

約数列:

[1, 2, 5, 7, 10, 13, 14, 25, 26, 35, 50, 65, 70, 71, 91, 125, 130, 142, 169, 175, 182, 250, 325, 338, 350, 355, 455, 497, 650, 710, 845, 875, 910, 923, 994, 1183, 1625, 1690, 1750, 1775, 1846, 2275, 2366, 2485, 3250, 3550, 4225, 4550, 4615, 4970, 5915, 6461, 8450, 8875, 9230, 11375, 11830, 11999, 12425, 12922, 17750, 21125, 22750, 23075, 23998, 24850, 29575, 32305, 42250, 46150, 59150, 59995, 62125, 64610, 83993, 115375, 119990, 124250, 147875, 161525, 167986, 230750, 295750, 299975, 323050, 419965, 599950, 807625, 839930, 1499875, 1615250, 2099825, 2999750, 4199650, 10499125, 20998250]

約数ペア:

[(1, 20998250), (2, 10499125), (5, 4199650), (7, 2999750), (10, 2099825), (13, 1615250), (14, 1499875), (25, 839930), (26, 807625), (35, 599950), (50, 419965), (65, 323050), (70, 299975), (71, 295750), (91, 230750), (125, 167986), (130, 161525), (142, 147875), (169, 124250), (175, 119990), (182, 115375), (250, 83993), (325, 64610), (338, 62125), (350, 59995), (355, 59150), (455, 46150), (497, 42250), (650, 32305), (710, 29575), (845, 24850), (875, 23998), (910, 23075), (923, 22750), (994, 21125), (1183, 17750), (1625, 12922), (1690, 12425), (1750, 11999), (1775, 11830), (1846, 11375), (2275, 9230), (2366, 8875), (2485, 8450), (3250, 6461), (3550, 5915), (4225, 4970), (4550, 4615)]