256679720

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^2\times {\mathrm{181}}^1\times {\mathrm{293}}^1$

素因数の和:507

約数の個数: 96

約数和(自身を含む): 640490760

約数和(自身を除く): 383811040

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 121, 181, 220, 242, 293, 362, 440, 484, 586, 605, 724, 905, 968, 1172, 1210, 1448, 1465, 1810, 1991, 2344, 2420, 2930, 3223, 3620, 3982, 4840, 5860, 6446, 7240, 7964, 9955, 11720, 12892, 15928, 16115, 19910, 21901, 25784, 32230, 35453, 39820, 43802, 53033, 64460, 70906, 79640, 87604, 106066, 109505, 128920, 141812, 175208, 177265, 212132, 219010, 265165, 283624, 354530, 424264, 438020, 530330, 583363, 709060, 876040, 1060660, 1166726, 1418120, 2121320, 2333452, 2916815, 4666904, 5833630, 6416993, 11667260, 12833986, 23334520, 25667972, 32084965, 51335944, 64169930, 128339860, 256679720]

約数ペア:

[(1, 256679720), (2, 128339860), (4, 64169930), (5, 51335944), (8, 32084965), (10, 25667972), (11, 23334520), (20, 12833986), (22, 11667260), (40, 6416993), (44, 5833630), (55, 4666904), (88, 2916815), (110, 2333452), (121, 2121320), (181, 1418120), (220, 1166726), (242, 1060660), (293, 876040), (362, 709060), (440, 583363), (484, 530330), (586, 438020), (605, 424264), (724, 354530), (905, 283624), (968, 265165), (1172, 219010), (1210, 212132), (1448, 177265), (1465, 175208), (1810, 141812), (1991, 128920), (2344, 109505), (2420, 106066), (2930, 87604), (3223, 79640), (3620, 70906), (3982, 64460), (4840, 53033), (5860, 43802), (6446, 39820), (7240, 35453), (7964, 32230), (9955, 25784), (11720, 21901), (12892, 19910), (15928, 16115)]