18719815

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{59}}^1\times {\mathrm{89}}^1$

素因数の和:207

約数の個数: 32

約数和(自身を含む): 24883200

約数和(自身を除く): 6163385

約数列:

[1, 5, 23, 31, 59, 89, 115, 155, 295, 445, 713, 1357, 1829, 2047, 2759, 3565, 5251, 6785, 9145, 10235, 13795, 26255, 42067, 63457, 120773, 162781, 210335, 317285, 603865, 813905, 3743963, 18719815]

約数ペア:

[(1, 18719815), (5, 3743963), (23, 813905), (31, 603865), (59, 317285), (89, 210335), (115, 162781), (155, 120773), (295, 63457), (445, 42067), (713, 26255), (1357, 13795), (1829, 10235), (2047, 9145), (2759, 6785), (3565, 5251)]