18259280

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{181}}^1$

素因数の和:304

約数の個数: 80

約数和(自身を含む): 46444944

約数和(自身を除く): 28185664

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 97, 104, 130, 181, 194, 208, 260, 362, 388, 485, 520, 724, 776, 905, 970, 1040, 1261, 1448, 1552, 1810, 1940, 2353, 2522, 2896, 3620, 3880, 4706, 5044, 6305, 7240, 7760, 9412, 10088, 11765, 12610, 14480, 17557, 18824, 20176, 23530, 25220, 35114, 37648, 47060, 50440, 70228, 87785, 94120, 100880, 140456, 175570, 188240, 228241, 280912, 351140, 456482, 702280, 912964, 1141205, 1404560, 1825928, 2282410, 3651856, 4564820, 9129640, 18259280]

約数ペア:

[(1, 18259280), (2, 9129640), (4, 4564820), (5, 3651856), (8, 2282410), (10, 1825928), (13, 1404560), (16, 1141205), (20, 912964), (26, 702280), (40, 456482), (52, 351140), (65, 280912), (80, 228241), (97, 188240), (104, 175570), (130, 140456), (181, 100880), (194, 94120), (208, 87785), (260, 70228), (362, 50440), (388, 47060), (485, 37648), (520, 35114), (724, 25220), (776, 23530), (905, 20176), (970, 18824), (1040, 17557), (1261, 14480), (1448, 12610), (1552, 11765), (1810, 10088), (1940, 9412), (2353, 7760), (2522, 7240), (2896, 6305), (3620, 5044), (3880, 4706)]