19912960

素因数分解:

$2^8\times 5^1\times {\mathrm{47}}^1\times {\mathrm{331}}^1$

素因数の和:399

約数の個数: 72

約数和(自身を含む): 48859776

約数和(自身を除く): 28946816

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 47, 64, 80, 94, 128, 160, 188, 235, 256, 320, 331, 376, 470, 640, 662, 752, 940, 1280, 1324, 1504, 1655, 1880, 2648, 3008, 3310, 3760, 5296, 6016, 6620, 7520, 10592, 12032, 13240, 15040, 15557, 21184, 26480, 30080, 31114, 42368, 52960, 60160, 62228, 77785, 84736, 105920, 124456, 155570, 211840, 248912, 311140, 423680, 497824, 622280, 995648, 1244560, 1991296, 2489120, 3982592, 4978240, 9956480, 19912960]

約数ペア:

[(1, 19912960), (2, 9956480), (4, 4978240), (5, 3982592), (8, 2489120), (10, 1991296), (16, 1244560), (20, 995648), (32, 622280), (40, 497824), (47, 423680), (64, 311140), (80, 248912), (94, 211840), (128, 155570), (160, 124456), (188, 105920), (235, 84736), (256, 77785), (320, 62228), (331, 60160), (376, 52960), (470, 42368), (640, 31114), (662, 30080), (752, 26480), (940, 21184), (1280, 15557), (1324, 15040), (1504, 13240), (1655, 12032), (1880, 10592), (2648, 7520), (3008, 6620), (3310, 6016), (3760, 5296)]