21061400

素因数分解:

$2^3\times 5^2\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{79}}^1$

素因数の和:169

約数の個数: 96

約数和(自身を含む): 52377600

約数和(自身を除く): 31316200

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 31, 40, 43, 50, 62, 79, 86, 100, 124, 155, 158, 172, 200, 215, 248, 310, 316, 344, 395, 430, 620, 632, 775, 790, 860, 1075, 1240, 1333, 1550, 1580, 1720, 1975, 2150, 2449, 2666, 3100, 3160, 3397, 3950, 4300, 4898, 5332, 6200, 6665, 6794, 7900, 8600, 9796, 10664, 12245, 13330, 13588, 15800, 16985, 19592, 24490, 26660, 27176, 33325, 33970, 48980, 53320, 61225, 66650, 67940, 84925, 97960, 105307, 122450, 133300, 135880, 169850, 210614, 244900, 266600, 339700, 421228, 489800, 526535, 679400, 842456, 1053070, 2106140, 2632675, 4212280, 5265350, 10530700, 21061400]

約数ペア:

[(1, 21061400), (2, 10530700), (4, 5265350), (5, 4212280), (8, 2632675), (10, 2106140), (20, 1053070), (25, 842456), (31, 679400), (40, 526535), (43, 489800), (50, 421228), (62, 339700), (79, 266600), (86, 244900), (100, 210614), (124, 169850), (155, 135880), (158, 133300), (172, 122450), (200, 105307), (215, 97960), (248, 84925), (310, 67940), (316, 66650), (344, 61225), (395, 53320), (430, 48980), (620, 33970), (632, 33325), (775, 27176), (790, 26660), (860, 24490), (1075, 19592), (1240, 16985), (1333, 15800), (1550, 13588), (1580, 13330), (1720, 12245), (1975, 10664), (2150, 9796), (2449, 8600), (2666, 7900), (3100, 6794), (3160, 6665), (3397, 6200), (3950, 5332), (4300, 4898)]