20785905

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{151}}^1$

素因数の和:211

約数の個数: 96

約数和(自身を含む): 45527040

約数和(自身を除く): 24741135

約数列:

[1, 3, 5, 7, 9, 15, 19, 21, 23, 35, 45, 57, 63, 69, 95, 105, 115, 133, 151, 161, 171, 207, 285, 315, 345, 399, 437, 453, 483, 665, 755, 805, 855, 1035, 1057, 1197, 1311, 1359, 1449, 1995, 2185, 2265, 2415, 2869, 3059, 3171, 3473, 3933, 5285, 5985, 6555, 6795, 7245, 8607, 9177, 9513, 10419, 14345, 15295, 15855, 17365, 19665, 20083, 24311, 25821, 27531, 31257, 43035, 45885, 47565, 52095, 60249, 65987, 72933, 100415, 121555, 129105, 137655, 156285, 180747, 197961, 218799, 301245, 329935, 364665, 461909, 593883, 903735, 989805, 1093995, 1385727, 2309545, 2969415, 4157181, 6928635, 20785905]

約数ペア:

[(1, 20785905), (3, 6928635), (5, 4157181), (7, 2969415), (9, 2309545), (15, 1385727), (19, 1093995), (21, 989805), (23, 903735), (35, 593883), (45, 461909), (57, 364665), (63, 329935), (69, 301245), (95, 218799), (105, 197961), (115, 180747), (133, 156285), (151, 137655), (161, 129105), (171, 121555), (207, 100415), (285, 72933), (315, 65987), (345, 60249), (399, 52095), (437, 47565), (453, 45885), (483, 43035), (665, 31257), (755, 27531), (805, 25821), (855, 24311), (1035, 20083), (1057, 19665), (1197, 17365), (1311, 15855), (1359, 15295), (1449, 14345), (1995, 10419), (2185, 9513), (2265, 9177), (2415, 8607), (2869, 7245), (3059, 6795), (3171, 6555), (3473, 5985), (3933, 5285)]