18700520

素因数分解:

$2^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{8821}}^1$

素因数の和:8885

約数の個数: 32

約数和(自身を含む): 42874920

約数和(自身を除く): 24174400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 53, 106, 212, 265, 424, 530, 1060, 2120, 8821, 17642, 35284, 44105, 70568, 88210, 176420, 352840, 467513, 935026, 1870052, 2337565, 3740104, 4675130, 9350260, 18700520]

約数ペア:

[(1, 18700520), (2, 9350260), (4, 4675130), (5, 3740104), (8, 2337565), (10, 1870052), (20, 935026), (40, 467513), (53, 352840), (106, 176420), (212, 88210), (265, 70568), (424, 44105), (530, 35284), (1060, 17642), (2120, 8821)]