21131568

素因数分解:

$2^4\times 3^2\times {\mathrm{257}}^1\times {\mathrm{571}}^1$

素因数の和:842

約数の個数: 60

約数和(自身を含む): 59473128

約数和(自身を除く): 38341560

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 36, 48, 72, 144, 257, 514, 571, 771, 1028, 1142, 1542, 1713, 2056, 2284, 2313, 3084, 3426, 4112, 4568, 4626, 5139, 6168, 6852, 9136, 9252, 10278, 12336, 13704, 18504, 20556, 27408, 37008, 41112, 82224, 146747, 293494, 440241, 586988, 880482, 1173976, 1320723, 1760964, 2347952, 2641446, 3521928, 5282892, 7043856, 10565784, 21131568]

約数ペア:

[(1, 21131568), (2, 10565784), (3, 7043856), (4, 5282892), (6, 3521928), (8, 2641446), (9, 2347952), (12, 1760964), (16, 1320723), (18, 1173976), (24, 880482), (36, 586988), (48, 440241), (72, 293494), (144, 146747), (257, 82224), (514, 41112), (571, 37008), (771, 27408), (1028, 20556), (1142, 18504), (1542, 13704), (1713, 12336), (2056, 10278), (2284, 9252), (2313, 9136), (3084, 6852), (3426, 6168), (4112, 5139), (4568, 4626)]