20001860

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{661}}^1$

素因数の和:776

約数の個数: 48

約数和(自身を含む): 45042480

約数和(自身を除く): 25040620

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 89, 170, 178, 340, 356, 445, 661, 890, 1322, 1513, 1780, 2644, 3026, 3305, 6052, 6610, 7565, 11237, 13220, 15130, 22474, 30260, 44948, 56185, 58829, 112370, 117658, 224740, 235316, 294145, 588290, 1000093, 1176580, 2000186, 4000372, 5000465, 10000930, 20001860]

約数ペア:

[(1, 20001860), (2, 10000930), (4, 5000465), (5, 4000372), (10, 2000186), (17, 1176580), (20, 1000093), (34, 588290), (68, 294145), (85, 235316), (89, 224740), (170, 117658), (178, 112370), (340, 58829), (356, 56185), (445, 44948), (661, 30260), (890, 22474), (1322, 15130), (1513, 13220), (1780, 11237), (2644, 7565), (3026, 6610), (3305, 6052)]