20188760

素因数分解:

$2^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{89}}^1\times {\mathrm{107}}^1$

素因数の和:260

約数の個数: 64

約数和(自身を含む): 47239200

約数和(自身を除く): 27050440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 53, 89, 106, 107, 178, 212, 214, 265, 356, 424, 428, 445, 530, 535, 712, 856, 890, 1060, 1070, 1780, 2120, 2140, 3560, 4280, 4717, 5671, 9434, 9523, 11342, 18868, 19046, 22684, 23585, 28355, 37736, 38092, 45368, 47170, 47615, 56710, 76184, 94340, 95230, 113420, 188680, 190460, 226840, 380920, 504719, 1009438, 2018876, 2523595, 4037752, 5047190, 10094380, 20188760]

約数ペア:

[(1, 20188760), (2, 10094380), (4, 5047190), (5, 4037752), (8, 2523595), (10, 2018876), (20, 1009438), (40, 504719), (53, 380920), (89, 226840), (106, 190460), (107, 188680), (178, 113420), (212, 95230), (214, 94340), (265, 76184), (356, 56710), (424, 47615), (428, 47170), (445, 45368), (530, 38092), (535, 37736), (712, 28355), (856, 23585), (890, 22684), (1060, 19046), (1070, 18868), (1780, 11342), (2120, 9523), (2140, 9434), (3560, 5671), (4280, 4717)]