21030700

素因数分解:

$2^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{139}}^1$

素因数の和:259

約数の個数: 72

約数和(自身を含む): 49215600

約数和(自身を除く): 28184900

約数列:

[1, 2, 4, 5, 10, 17, 20, 25, 34, 50, 68, 85, 89, 100, 139, 170, 178, 278, 340, 356, 425, 445, 556, 695, 850, 890, 1390, 1513, 1700, 1780, 2225, 2363, 2780, 3026, 3475, 4450, 4726, 6052, 6950, 7565, 8900, 9452, 11815, 12371, 13900, 15130, 23630, 24742, 30260, 37825, 47260, 49484, 59075, 61855, 75650, 118150, 123710, 151300, 210307, 236300, 247420, 309275, 420614, 618550, 841228, 1051535, 1237100, 2103070, 4206140, 5257675, 10515350, 21030700]

約数ペア:

[(1, 21030700), (2, 10515350), (4, 5257675), (5, 4206140), (10, 2103070), (17, 1237100), (20, 1051535), (25, 841228), (34, 618550), (50, 420614), (68, 309275), (85, 247420), (89, 236300), (100, 210307), (139, 151300), (170, 123710), (178, 118150), (278, 75650), (340, 61855), (356, 59075), (425, 49484), (445, 47260), (556, 37825), (695, 30260), (850, 24742), (890, 23630), (1390, 15130), (1513, 13900), (1700, 12371), (1780, 11815), (2225, 9452), (2363, 8900), (2780, 7565), (3026, 6950), (3475, 6052), (4450, 4726)]