21038320

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{13841}}^1$

素因数の和:13873

約数の個数: 40

約数和(自身を含む): 51492240

約数和(自身を除く): 30453920

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 13841, 27682, 55364, 69205, 110728, 138410, 221456, 262979, 276820, 525958, 553640, 1051916, 1107280, 1314895, 2103832, 2629790, 4207664, 5259580, 10519160, 21038320]

約数ペア:

[(1, 21038320), (2, 10519160), (4, 5259580), (5, 4207664), (8, 2629790), (10, 2103832), (16, 1314895), (19, 1107280), (20, 1051916), (38, 553640), (40, 525958), (76, 276820), (80, 262979), (95, 221456), (152, 138410), (190, 110728), (304, 69205), (380, 55364), (760, 27682), (1520, 13841)]