19920640

素因数分解:

$2^8\times 5^1\times {\mathrm{79}}^1\times {\mathrm{197}}^1$

素因数の和:297

約数の個数: 72

約数和(自身を含む): 48565440

約数和(自身を除く): 28644800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 79, 80, 128, 158, 160, 197, 256, 316, 320, 394, 395, 632, 640, 788, 790, 985, 1264, 1280, 1576, 1580, 1970, 2528, 3152, 3160, 3940, 5056, 6304, 6320, 7880, 10112, 12608, 12640, 15563, 15760, 20224, 25216, 25280, 31126, 31520, 50432, 50560, 62252, 63040, 77815, 101120, 124504, 126080, 155630, 249008, 252160, 311260, 498016, 622520, 996032, 1245040, 1992064, 2490080, 3984128, 4980160, 9960320, 19920640]

約数ペア:

[(1, 19920640), (2, 9960320), (4, 4980160), (5, 3984128), (8, 2490080), (10, 1992064), (16, 1245040), (20, 996032), (32, 622520), (40, 498016), (64, 311260), (79, 252160), (80, 249008), (128, 155630), (158, 126080), (160, 124504), (197, 101120), (256, 77815), (316, 63040), (320, 62252), (394, 50560), (395, 50432), (632, 31520), (640, 31126), (788, 25280), (790, 25216), (985, 20224), (1264, 15760), (1280, 15563), (1576, 12640), (1580, 12608), (1970, 10112), (2528, 7880), (3152, 6320), (3160, 6304), (3940, 5056)]