20489560

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{433}}^1$

素因数の和:477

約数の個数: 96

約数和(自身を含む): 57183840

約数和(自身を除く): 36694280

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 20, 26, 28, 35, 40, 52, 56, 65, 70, 91, 104, 130, 140, 169, 182, 260, 280, 338, 364, 433, 455, 520, 676, 728, 845, 866, 910, 1183, 1352, 1690, 1732, 1820, 2165, 2366, 3031, 3380, 3464, 3640, 4330, 4732, 5629, 5915, 6062, 6760, 8660, 9464, 11258, 11830, 12124, 15155, 17320, 22516, 23660, 24248, 28145, 30310, 39403, 45032, 47320, 56290, 60620, 73177, 78806, 112580, 121240, 146354, 157612, 197015, 225160, 292708, 315224, 365885, 394030, 512239, 585416, 731770, 788060, 1024478, 1463540, 1576120, 2048956, 2561195, 2927080, 4097912, 5122390, 10244780, 20489560]

約数ペア:

[(1, 20489560), (2, 10244780), (4, 5122390), (5, 4097912), (7, 2927080), (8, 2561195), (10, 2048956), (13, 1576120), (14, 1463540), (20, 1024478), (26, 788060), (28, 731770), (35, 585416), (40, 512239), (52, 394030), (56, 365885), (65, 315224), (70, 292708), (91, 225160), (104, 197015), (130, 157612), (140, 146354), (169, 121240), (182, 112580), (260, 78806), (280, 73177), (338, 60620), (364, 56290), (433, 47320), (455, 45032), (520, 39403), (676, 30310), (728, 28145), (845, 24248), (866, 23660), (910, 22516), (1183, 17320), (1352, 15155), (1690, 12124), (1732, 11830), (1820, 11258), (2165, 9464), (2366, 8660), (3031, 6760), (3380, 6062), (3464, 5915), (3640, 5629), (4330, 4732)]