19661420

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{109}}^1\times {\mathrm{311}}^1$

素因数の和:458

約数の個数: 48

約数和(自身を含む): 43243200

約数和(自身を除く): 23581780

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 109, 116, 145, 218, 290, 311, 436, 545, 580, 622, 1090, 1244, 1555, 2180, 3110, 3161, 6220, 6322, 9019, 12644, 15805, 18038, 31610, 33899, 36076, 45095, 63220, 67798, 90190, 135596, 169495, 180380, 338990, 677980, 983071, 1966142, 3932284, 4915355, 9830710, 19661420]

約数ペア:

[(1, 19661420), (2, 9830710), (4, 4915355), (5, 3932284), (10, 1966142), (20, 983071), (29, 677980), (58, 338990), (109, 180380), (116, 169495), (145, 135596), (218, 90190), (290, 67798), (311, 63220), (436, 45095), (545, 36076), (580, 33899), (622, 31610), (1090, 18038), (1244, 15805), (1555, 12644), (2180, 9019), (3110, 6322), (3161, 6220)]