21254720

素因数分解:

$2^6\times 5^1\times {\mathrm{127}}^1\times {\mathrm{523}}^1$

素因数の和:667

約数の個数: 56

約数和(自身を含む): 51108864

約数和(自身を除く): 29854144

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 127, 160, 254, 320, 508, 523, 635, 1016, 1046, 1270, 2032, 2092, 2540, 2615, 4064, 4184, 5080, 5230, 8128, 8368, 10160, 10460, 16736, 20320, 20920, 33472, 40640, 41840, 66421, 83680, 132842, 167360, 265684, 332105, 531368, 664210, 1062736, 1328420, 2125472, 2656840, 4250944, 5313680, 10627360, 21254720]

約数ペア:

[(1, 21254720), (2, 10627360), (4, 5313680), (5, 4250944), (8, 2656840), (10, 2125472), (16, 1328420), (20, 1062736), (32, 664210), (40, 531368), (64, 332105), (80, 265684), (127, 167360), (160, 132842), (254, 83680), (320, 66421), (508, 41840), (523, 40640), (635, 33472), (1016, 20920), (1046, 20320), (1270, 16736), (2032, 10460), (2092, 10160), (2540, 8368), (2615, 8128), (4064, 5230), (4184, 5080)]