19812880

素因数分解:

$2^4\times 5^1\times {\mathrm{167}}^1\times {\mathrm{1483}}^1$

素因数の和:1663

約数の個数: 40

約数和(自身を含む): 46372032

約数和(自身を除く): 26559152

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 167, 334, 668, 835, 1336, 1483, 1670, 2672, 2966, 3340, 5932, 6680, 7415, 11864, 13360, 14830, 23728, 29660, 59320, 118640, 247661, 495322, 990644, 1238305, 1981288, 2476610, 3962576, 4953220, 9906440, 19812880]

約数ペア:

[(1, 19812880), (2, 9906440), (4, 4953220), (5, 3962576), (8, 2476610), (10, 1981288), (16, 1238305), (20, 990644), (40, 495322), (80, 247661), (167, 118640), (334, 59320), (668, 29660), (835, 23728), (1336, 14830), (1483, 13360), (1670, 11864), (2672, 7415), (2966, 6680), (3340, 5932)]