21399560

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{5879}}^1$

素因数の和:5910

約数の個数: 64

約数和(自身を含む): 59270400

約数和(自身を除く): 37870840

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, 182, 260, 280, 364, 455, 520, 728, 910, 1820, 3640, 5879, 11758, 23516, 29395, 41153, 47032, 58790, 76427, 82306, 117580, 152854, 164612, 205765, 235160, 305708, 329224, 382135, 411530, 534989, 611416, 764270, 823060, 1069978, 1528540, 1646120, 2139956, 2674945, 3057080, 4279912, 5349890, 10699780, 21399560]

約数ペア:

[(1, 21399560), (2, 10699780), (4, 5349890), (5, 4279912), (7, 3057080), (8, 2674945), (10, 2139956), (13, 1646120), (14, 1528540), (20, 1069978), (26, 823060), (28, 764270), (35, 611416), (40, 534989), (52, 411530), (56, 382135), (65, 329224), (70, 305708), (91, 235160), (104, 205765), (130, 164612), (140, 152854), (182, 117580), (260, 82306), (280, 76427), (364, 58790), (455, 47032), (520, 41153), (728, 29395), (910, 23516), (1820, 11758), (3640, 5879)]