21745750

素因数分解:

$2^1\times 5^3\times {\mathrm{13}}^1\times {\mathrm{6691}}^1$

素因数の和:6721

約数の個数: 32

約数和(自身を含む): 43845984

約数和(自身を除く): 22100234

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 125, 130, 250, 325, 650, 1625, 3250, 6691, 13382, 33455, 66910, 86983, 167275, 173966, 334550, 434915, 836375, 869830, 1672750, 2174575, 4349150, 10872875, 21745750]

約数ペア:

[(1, 21745750), (2, 10872875), (5, 4349150), (10, 2174575), (13, 1672750), (25, 869830), (26, 836375), (50, 434915), (65, 334550), (125, 173966), (130, 167275), (250, 86983), (325, 66910), (650, 33455), (1625, 13382), (3250, 6691)]