21269740

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{223}}^1\times {\mathrm{251}}^1$

素因数の和:502

約数の個数: 48

約数和(自身を含む): 47416320

約数和(自身を除く): 26146580

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 223, 251, 380, 446, 502, 892, 1004, 1115, 1255, 2230, 2510, 4237, 4460, 4769, 5020, 8474, 9538, 16948, 19076, 21185, 23845, 42370, 47690, 55973, 84740, 95380, 111946, 223892, 279865, 559730, 1063487, 1119460, 2126974, 4253948, 5317435, 10634870, 21269740]

約数ペア:

[(1, 21269740), (2, 10634870), (4, 5317435), (5, 4253948), (10, 2126974), (19, 1119460), (20, 1063487), (38, 559730), (76, 279865), (95, 223892), (190, 111946), (223, 95380), (251, 84740), (380, 55973), (446, 47690), (502, 42370), (892, 23845), (1004, 21185), (1115, 19076), (1255, 16948), (2230, 9538), (2510, 8474), (4237, 5020), (4460, 4769)]