18787840

素因数分解:

$2^9\times 5^1\times {\mathrm{41}}^1\times {\mathrm{179}}^1$

素因数の和:243

約数の個数: 80

約数和(自身を含む): 46403280

約数和(自身を除く): 27615440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 64, 80, 82, 128, 160, 164, 179, 205, 256, 320, 328, 358, 410, 512, 640, 656, 716, 820, 895, 1280, 1312, 1432, 1640, 1790, 2560, 2624, 2864, 3280, 3580, 5248, 5728, 6560, 7160, 7339, 10496, 11456, 13120, 14320, 14678, 20992, 22912, 26240, 28640, 29356, 36695, 45824, 52480, 57280, 58712, 73390, 91648, 104960, 114560, 117424, 146780, 229120, 234848, 293560, 458240, 469696, 587120, 939392, 1174240, 1878784, 2348480, 3757568, 4696960, 9393920, 18787840]

約数ペア:

[(1, 18787840), (2, 9393920), (4, 4696960), (5, 3757568), (8, 2348480), (10, 1878784), (16, 1174240), (20, 939392), (32, 587120), (40, 469696), (41, 458240), (64, 293560), (80, 234848), (82, 229120), (128, 146780), (160, 117424), (164, 114560), (179, 104960), (205, 91648), (256, 73390), (320, 58712), (328, 57280), (358, 52480), (410, 45824), (512, 36695), (640, 29356), (656, 28640), (716, 26240), (820, 22912), (895, 20992), (1280, 14678), (1312, 14320), (1432, 13120), (1640, 11456), (1790, 10496), (2560, 7339), (2624, 7160), (2864, 6560), (3280, 5728), (3580, 5248)]