19645880

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{167}}^1\times {\mathrm{173}}^1$

素因数の和:368

約数の個数: 64

約数和(自身を含む): 47355840

約数和(自身を除く): 27709960

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 167, 170, 173, 334, 340, 346, 668, 680, 692, 835, 865, 1336, 1384, 1670, 1730, 2839, 2941, 3340, 3460, 5678, 5882, 6680, 6920, 11356, 11764, 14195, 14705, 22712, 23528, 28390, 28891, 29410, 56780, 57782, 58820, 113560, 115564, 117640, 144455, 231128, 288910, 491147, 577820, 982294, 1155640, 1964588, 2455735, 3929176, 4911470, 9822940, 19645880]

約数ペア:

[(1, 19645880), (2, 9822940), (4, 4911470), (5, 3929176), (8, 2455735), (10, 1964588), (17, 1155640), (20, 982294), (34, 577820), (40, 491147), (68, 288910), (85, 231128), (136, 144455), (167, 117640), (170, 115564), (173, 113560), (334, 58820), (340, 57782), (346, 56780), (668, 29410), (680, 28891), (692, 28390), (835, 23528), (865, 22712), (1336, 14705), (1384, 14195), (1670, 11764), (1730, 11356), (2839, 6920), (2941, 6680), (3340, 5882), (3460, 5678)]