18845720

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{137}}^1\times {\mathrm{181}}^1$

素因数の和:348

約数の個数: 64

約数和(自身を含む): 45208800

約数和(自身を除く): 26363080

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 137, 152, 181, 190, 274, 362, 380, 548, 685, 724, 760, 905, 1096, 1370, 1448, 1810, 2603, 2740, 3439, 3620, 5206, 5480, 6878, 7240, 10412, 13015, 13756, 17195, 20824, 24797, 26030, 27512, 34390, 49594, 52060, 68780, 99188, 104120, 123985, 137560, 198376, 247970, 471143, 495940, 942286, 991880, 1884572, 2355715, 3769144, 4711430, 9422860, 18845720]

約数ペア:

[(1, 18845720), (2, 9422860), (4, 4711430), (5, 3769144), (8, 2355715), (10, 1884572), (19, 991880), (20, 942286), (38, 495940), (40, 471143), (76, 247970), (95, 198376), (137, 137560), (152, 123985), (181, 104120), (190, 99188), (274, 68780), (362, 52060), (380, 49594), (548, 34390), (685, 27512), (724, 26030), (760, 24797), (905, 20824), (1096, 17195), (1370, 13756), (1448, 13015), (1810, 10412), (2603, 7240), (2740, 6878), (3439, 5480), (3620, 5206)]