19892390

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{89}}^1\times {\mathrm{103}}^1$

素因数の和:237

約数の個数: 64

約数和(自身を含む): 43130880

約数和(自身を除く): 23238490

約数列:

[1, 2, 5, 7, 10, 14, 31, 35, 62, 70, 89, 103, 155, 178, 206, 217, 310, 434, 445, 515, 623, 721, 890, 1030, 1085, 1246, 1442, 2170, 2759, 3115, 3193, 3605, 5518, 6230, 6386, 7210, 9167, 13795, 15965, 18334, 19313, 22351, 27590, 31930, 38626, 44702, 45835, 64169, 91670, 96565, 111755, 128338, 193130, 223510, 284177, 320845, 568354, 641690, 1420885, 1989239, 2841770, 3978478, 9946195, 19892390]

約数ペア:

[(1, 19892390), (2, 9946195), (5, 3978478), (7, 2841770), (10, 1989239), (14, 1420885), (31, 641690), (35, 568354), (62, 320845), (70, 284177), (89, 223510), (103, 193130), (155, 128338), (178, 111755), (206, 96565), (217, 91670), (310, 64169), (434, 45835), (445, 44702), (515, 38626), (623, 31930), (721, 27590), (890, 22351), (1030, 19313), (1085, 18334), (1246, 15965), (1442, 13795), (2170, 9167), (2759, 7210), (3115, 6386), (3193, 6230), (3605, 5518)]