18789860

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{197}}^1\times {\mathrm{251}}^1$

素因数の和:476

約数の個数: 48

約数和(自身を含む): 41912640

約数和(自身を除く): 23122780

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 197, 251, 380, 394, 502, 788, 985, 1004, 1255, 1970, 2510, 3743, 3940, 4769, 5020, 7486, 9538, 14972, 18715, 19076, 23845, 37430, 47690, 49447, 74860, 95380, 98894, 197788, 247235, 494470, 939493, 988940, 1878986, 3757972, 4697465, 9394930, 18789860]

約数ペア:

[(1, 18789860), (2, 9394930), (4, 4697465), (5, 3757972), (10, 1878986), (19, 988940), (20, 939493), (38, 494470), (76, 247235), (95, 197788), (190, 98894), (197, 95380), (251, 74860), (380, 49447), (394, 47690), (502, 37430), (788, 23845), (985, 19076), (1004, 18715), (1255, 14972), (1970, 9538), (2510, 7486), (3743, 5020), (3940, 4769)]