18821960

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{353}}^1$

素因数の和:438

約数の個数: 64

約数和(自身を含む): 44858880

約数和(自身を除く): 26036920

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 43, 62, 86, 124, 155, 172, 215, 248, 310, 344, 353, 430, 620, 706, 860, 1240, 1333, 1412, 1720, 1765, 2666, 2824, 3530, 5332, 6665, 7060, 10664, 10943, 13330, 14120, 15179, 21886, 26660, 30358, 43772, 53320, 54715, 60716, 75895, 87544, 109430, 121432, 151790, 218860, 303580, 437720, 470549, 607160, 941098, 1882196, 2352745, 3764392, 4705490, 9410980, 18821960]

約数ペア:

[(1, 18821960), (2, 9410980), (4, 4705490), (5, 3764392), (8, 2352745), (10, 1882196), (20, 941098), (31, 607160), (40, 470549), (43, 437720), (62, 303580), (86, 218860), (124, 151790), (155, 121432), (172, 109430), (215, 87544), (248, 75895), (310, 60716), (344, 54715), (353, 53320), (430, 43772), (620, 30358), (706, 26660), (860, 21886), (1240, 15179), (1333, 14120), (1412, 13330), (1720, 10943), (1765, 10664), (2666, 7060), (2824, 6665), (3530, 5332)]