21070700

素因数分解:

$2^2\times 5^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{971}}^1$

素因数の和:1023

約数の個数: 72

約数和(自身を含む): 53996544

約数和(自身を除く): 32925844

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 31, 35, 50, 62, 70, 100, 124, 140, 155, 175, 217, 310, 350, 434, 620, 700, 775, 868, 971, 1085, 1550, 1942, 2170, 3100, 3884, 4340, 4855, 5425, 6797, 9710, 10850, 13594, 19420, 21700, 24275, 27188, 30101, 33985, 48550, 60202, 67970, 97100, 120404, 135940, 150505, 169925, 210707, 301010, 339850, 421414, 602020, 679700, 752525, 842828, 1053535, 1505050, 2107070, 3010100, 4214140, 5267675, 10535350, 21070700]

約数ペア:

[(1, 21070700), (2, 10535350), (4, 5267675), (5, 4214140), (7, 3010100), (10, 2107070), (14, 1505050), (20, 1053535), (25, 842828), (28, 752525), (31, 679700), (35, 602020), (50, 421414), (62, 339850), (70, 301010), (100, 210707), (124, 169925), (140, 150505), (155, 135940), (175, 120404), (217, 97100), (310, 67970), (350, 60202), (434, 48550), (620, 33985), (700, 30101), (775, 27188), (868, 24275), (971, 21700), (1085, 19420), (1550, 13594), (1942, 10850), (2170, 9710), (3100, 6797), (3884, 5425), (4340, 4855)]