21956805

素因数分解:

$3^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{12511}}^1$

素因数の和:12538

約数の個数: 32

約数和(自身を含む): 42040320

約数和(自身を除く): 20083515

約数列:

[1, 3, 5, 9, 13, 15, 27, 39, 45, 65, 117, 135, 195, 351, 585, 1755, 12511, 37533, 62555, 112599, 162643, 187665, 337797, 487929, 562995, 813215, 1463787, 1688985, 2439645, 4391361, 7318935, 21956805]

約数ペア:

[(1, 21956805), (3, 7318935), (5, 4391361), (9, 2439645), (13, 1688985), (15, 1463787), (27, 813215), (39, 562995), (45, 487929), (65, 337797), (117, 187665), (135, 162643), (195, 112599), (351, 62555), (585, 37533), (1755, 12511)]