21755440

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{733}}^1$

素因数の和:806

約数の個数: 80

約数和(自身を含む): 58978368

約数和(自身を除く): 37222928

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 53, 56, 70, 80, 106, 112, 140, 212, 265, 280, 371, 424, 530, 560, 733, 742, 848, 1060, 1466, 1484, 1855, 2120, 2932, 2968, 3665, 3710, 4240, 5131, 5864, 5936, 7330, 7420, 10262, 11728, 14660, 14840, 20524, 25655, 29320, 29680, 38849, 41048, 51310, 58640, 77698, 82096, 102620, 155396, 194245, 205240, 271943, 310792, 388490, 410480, 543886, 621584, 776980, 1087772, 1359715, 1553960, 2175544, 2719430, 3107920, 4351088, 5438860, 10877720, 21755440]

約数ペア:

[(1, 21755440), (2, 10877720), (4, 5438860), (5, 4351088), (7, 3107920), (8, 2719430), (10, 2175544), (14, 1553960), (16, 1359715), (20, 1087772), (28, 776980), (35, 621584), (40, 543886), (53, 410480), (56, 388490), (70, 310792), (80, 271943), (106, 205240), (112, 194245), (140, 155396), (212, 102620), (265, 82096), (280, 77698), (371, 58640), (424, 51310), (530, 41048), (560, 38849), (733, 29680), (742, 29320), (848, 25655), (1060, 20524), (1466, 14840), (1484, 14660), (1855, 11728), (2120, 10262), (2932, 7420), (2968, 7330), (3665, 5936), (3710, 5864), (4240, 5131)]