19977280

素因数分解:

$2^6\times 5^1\times {\mathrm{163}}^1\times {\mathrm{383}}^1$

素因数の和:563

約数の個数: 56

約数和(自身を含む): 47987712

約数和(自身を除く): 28010432

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 163, 320, 326, 383, 652, 766, 815, 1304, 1532, 1630, 1915, 2608, 3064, 3260, 3830, 5216, 6128, 6520, 7660, 10432, 12256, 13040, 15320, 24512, 26080, 30640, 52160, 61280, 62429, 122560, 124858, 249716, 312145, 499432, 624290, 998864, 1248580, 1997728, 2497160, 3995456, 4994320, 9988640, 19977280]

約数ペア:

[(1, 19977280), (2, 9988640), (4, 4994320), (5, 3995456), (8, 2497160), (10, 1997728), (16, 1248580), (20, 998864), (32, 624290), (40, 499432), (64, 312145), (80, 249716), (160, 124858), (163, 122560), (320, 62429), (326, 61280), (383, 52160), (652, 30640), (766, 26080), (815, 24512), (1304, 15320), (1532, 13040), (1630, 12256), (1915, 10432), (2608, 7660), (3064, 6520), (3260, 6128), (3830, 5216)]