21197800

素因数分解:

$2^3\times 5^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{263}}^1$

素因数の和:323

約数の個数: 96

約数和(自身を含む): 54996480

約数和(自身を除く): 33798680

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 25, 26, 31, 40, 50, 52, 62, 65, 100, 104, 124, 130, 155, 200, 248, 260, 263, 310, 325, 403, 520, 526, 620, 650, 775, 806, 1052, 1240, 1300, 1315, 1550, 1612, 2015, 2104, 2600, 2630, 3100, 3224, 3419, 4030, 5260, 6200, 6575, 6838, 8060, 8153, 10075, 10520, 13150, 13676, 16120, 16306, 17095, 20150, 26300, 27352, 32612, 34190, 40300, 40765, 52600, 65224, 68380, 80600, 81530, 85475, 105989, 136760, 163060, 170950, 203825, 211978, 326120, 341900, 407650, 423956, 529945, 683800, 815300, 847912, 1059890, 1630600, 2119780, 2649725, 4239560, 5299450, 10598900, 21197800]

約数ペア:

[(1, 21197800), (2, 10598900), (4, 5299450), (5, 4239560), (8, 2649725), (10, 2119780), (13, 1630600), (20, 1059890), (25, 847912), (26, 815300), (31, 683800), (40, 529945), (50, 423956), (52, 407650), (62, 341900), (65, 326120), (100, 211978), (104, 203825), (124, 170950), (130, 163060), (155, 136760), (200, 105989), (248, 85475), (260, 81530), (263, 80600), (310, 68380), (325, 65224), (403, 52600), (520, 40765), (526, 40300), (620, 34190), (650, 32612), (775, 27352), (806, 26300), (1052, 20150), (1240, 17095), (1300, 16306), (1315, 16120), (1550, 13676), (1612, 13150), (2015, 10520), (2104, 10075), (2600, 8153), (2630, 8060), (3100, 6838), (3224, 6575), (3419, 6200), (4030, 5260)]