18638865

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{79}}^1\times {\mathrm{107}}^1$

素因数の和:211

約数の個数: 72

約数和(自身を含む): 38413440

約数和(自身を除く): 19774575

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 49, 63, 79, 105, 107, 147, 237, 245, 315, 321, 395, 441, 535, 553, 711, 735, 749, 963, 1185, 1605, 1659, 2205, 2247, 2765, 3555, 3745, 3871, 4815, 4977, 5243, 6741, 8295, 8453, 11235, 11613, 15729, 19355, 24885, 25359, 26215, 33705, 34839, 42265, 47187, 58065, 59171, 76077, 78645, 126795, 174195, 177513, 235935, 295855, 380385, 414197, 532539, 887565, 1242591, 2070985, 2662695, 3727773, 6212955, 18638865]

約数ペア:

[(1, 18638865), (3, 6212955), (5, 3727773), (7, 2662695), (9, 2070985), (15, 1242591), (21, 887565), (35, 532539), (45, 414197), (49, 380385), (63, 295855), (79, 235935), (105, 177513), (107, 174195), (147, 126795), (237, 78645), (245, 76077), (315, 59171), (321, 58065), (395, 47187), (441, 42265), (535, 34839), (553, 33705), (711, 26215), (735, 25359), (749, 24885), (963, 19355), (1185, 15729), (1605, 11613), (1659, 11235), (2205, 8453), (2247, 8295), (2765, 6741), (3555, 5243), (3745, 4977), (3871, 4815)]