19910740

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{157}}^1\times {\mathrm{373}}^1$

素因数の和:556

約数の個数: 48

約数和(自身を含む): 44673552

約数和(自身を除く): 24762812

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 157, 170, 314, 340, 373, 628, 746, 785, 1492, 1570, 1865, 2669, 3140, 3730, 5338, 6341, 7460, 10676, 12682, 13345, 25364, 26690, 31705, 53380, 58561, 63410, 117122, 126820, 234244, 292805, 585610, 995537, 1171220, 1991074, 3982148, 4977685, 9955370, 19910740]

約数ペア:

[(1, 19910740), (2, 9955370), (4, 4977685), (5, 3982148), (10, 1991074), (17, 1171220), (20, 995537), (34, 585610), (68, 292805), (85, 234244), (157, 126820), (170, 117122), (314, 63410), (340, 58561), (373, 53380), (628, 31705), (746, 26690), (785, 25364), (1492, 13345), (1570, 12682), (1865, 10676), (2669, 7460), (3140, 6341), (3730, 5338)]