20323940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{859}}^1$

素因数の和:901

約数の個数: 72

約数和(自身を含む): 52879680

約数和(自身を除く): 32555740

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 169, 182, 260, 338, 364, 455, 676, 845, 859, 910, 1183, 1690, 1718, 1820, 2366, 3380, 3436, 4295, 4732, 5915, 6013, 8590, 11167, 11830, 12026, 17180, 22334, 23660, 24052, 30065, 44668, 55835, 60130, 78169, 111670, 120260, 145171, 156338, 223340, 290342, 312676, 390845, 580684, 725855, 781690, 1016197, 1451710, 1563380, 2032394, 2903420, 4064788, 5080985, 10161970, 20323940]

約数ペア:

[(1, 20323940), (2, 10161970), (4, 5080985), (5, 4064788), (7, 2903420), (10, 2032394), (13, 1563380), (14, 1451710), (20, 1016197), (26, 781690), (28, 725855), (35, 580684), (52, 390845), (65, 312676), (70, 290342), (91, 223340), (130, 156338), (140, 145171), (169, 120260), (182, 111670), (260, 78169), (338, 60130), (364, 55835), (455, 44668), (676, 30065), (845, 24052), (859, 23660), (910, 22334), (1183, 17180), (1690, 12026), (1718, 11830), (1820, 11167), (2366, 8590), (3380, 6013), (3436, 5915), (4295, 4732)]