309440540

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{263}}^1\times {\mathrm{661}}^1$

素因数の和:1022

約数の個数: 48

約数和(自身を含む): 660623040

約数和(自身を除く): 351182500

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 263, 356, 445, 526, 661, 890, 1052, 1315, 1322, 1780, 2630, 2644, 3305, 5260, 6610, 13220, 23407, 46814, 58829, 93628, 117035, 117658, 173843, 234070, 235316, 294145, 347686, 468140, 588290, 695372, 869215, 1176580, 1738430, 3476860, 15472027, 30944054, 61888108, 77360135, 154720270, 309440540]

約数ペア:

[(1, 309440540), (2, 154720270), (4, 77360135), (5, 61888108), (10, 30944054), (20, 15472027), (89, 3476860), (178, 1738430), (263, 1176580), (356, 869215), (445, 695372), (526, 588290), (661, 468140), (890, 347686), (1052, 294145), (1315, 235316), (1322, 234070), (1780, 173843), (2630, 117658), (2644, 117035), (3305, 93628), (5260, 58829), (6610, 46814), (13220, 23407)]