18906584

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{61}}^1$

素因数の和:180

約数の個数: 64

約数和(自身を含む): 39774240

約数和(自身を除く): 20867656

約数列:

[1, 2, 4, 8, 17, 34, 43, 53, 61, 68, 86, 106, 122, 136, 172, 212, 244, 344, 424, 488, 731, 901, 1037, 1462, 1802, 2074, 2279, 2623, 2924, 3233, 3604, 4148, 4558, 5246, 5848, 6466, 7208, 8296, 9116, 10492, 12932, 18232, 20984, 25864, 38743, 44591, 54961, 77486, 89182, 109922, 139019, 154972, 178364, 219844, 278038, 309944, 356728, 439688, 556076, 1112152, 2363323, 4726646, 9453292, 18906584]

約数ペア:

[(1, 18906584), (2, 9453292), (4, 4726646), (8, 2363323), (17, 1112152), (34, 556076), (43, 439688), (53, 356728), (61, 309944), (68, 278038), (86, 219844), (106, 178364), (122, 154972), (136, 139019), (172, 109922), (212, 89182), (244, 77486), (344, 54961), (424, 44591), (488, 38743), (731, 25864), (901, 20984), (1037, 18232), (1462, 12932), (1802, 10492), (2074, 9116), (2279, 8296), (2623, 7208), (2924, 6466), (3233, 5848), (3604, 5246), (4148, 4558)]