18675760

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{89}}^1$

素因数の和:206

約数の個数: 80

約数和(自身を含む): 45666720

約数和(自身を除く): 26990960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 61, 80, 86, 89, 122, 172, 178, 215, 244, 305, 344, 356, 430, 445, 488, 610, 688, 712, 860, 890, 976, 1220, 1424, 1720, 1780, 2440, 2623, 3440, 3560, 3827, 4880, 5246, 5429, 7120, 7654, 10492, 10858, 13115, 15308, 19135, 20984, 21716, 26230, 27145, 30616, 38270, 41968, 43432, 52460, 54290, 61232, 76540, 86864, 104920, 108580, 153080, 209840, 217160, 233447, 306160, 434320, 466894, 933788, 1167235, 1867576, 2334470, 3735152, 4668940, 9337880, 18675760]

約数ペア:

[(1, 18675760), (2, 9337880), (4, 4668940), (5, 3735152), (8, 2334470), (10, 1867576), (16, 1167235), (20, 933788), (40, 466894), (43, 434320), (61, 306160), (80, 233447), (86, 217160), (89, 209840), (122, 153080), (172, 108580), (178, 104920), (215, 86864), (244, 76540), (305, 61232), (344, 54290), (356, 52460), (430, 43432), (445, 41968), (488, 38270), (610, 30616), (688, 27145), (712, 26230), (860, 21716), (890, 20984), (976, 19135), (1220, 15308), (1424, 13115), (1720, 10858), (1780, 10492), (2440, 7654), (2623, 7120), (3440, 5429), (3560, 5246), (3827, 4880)]