12678940

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{419}}^1$

素因数の和:534

約数の個数: 48

約数和(自身を含む): 28576800

約数和(自身を除く): 15897860

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 89, 170, 178, 340, 356, 419, 445, 838, 890, 1513, 1676, 1780, 2095, 3026, 4190, 6052, 7123, 7565, 8380, 14246, 15130, 28492, 30260, 35615, 37291, 71230, 74582, 142460, 149164, 186455, 372910, 633947, 745820, 1267894, 2535788, 3169735, 6339470, 12678940]

約数ペア:

[(1, 12678940), (2, 6339470), (4, 3169735), (5, 2535788), (10, 1267894), (17, 745820), (20, 633947), (34, 372910), (68, 186455), (85, 149164), (89, 142460), (170, 74582), (178, 71230), (340, 37291), (356, 35615), (419, 30260), (445, 28492), (838, 15130), (890, 14246), (1513, 8380), (1676, 7565), (1780, 7123), (2095, 6052), (3026, 4190)]