81566720

素因数分解:

$2^{10}\times 5^1\times {\mathrm{89}}^1\times {\mathrm{179}}^1$

素因数の和:293

約数の個数: 88

約数和(自身を含む): 198968400

約数和(自身を除く): 117401680

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 89, 128, 160, 178, 179, 256, 320, 356, 358, 445, 512, 640, 712, 716, 890, 895, 1024, 1280, 1424, 1432, 1780, 1790, 2560, 2848, 2864, 3560, 3580, 5120, 5696, 5728, 7120, 7160, 11392, 11456, 14240, 14320, 15931, 22784, 22912, 28480, 28640, 31862, 45568, 45824, 56960, 57280, 63724, 79655, 91136, 91648, 113920, 114560, 127448, 159310, 183296, 227840, 229120, 254896, 318620, 455680, 458240, 509792, 637240, 916480, 1019584, 1274480, 2039168, 2548960, 4078336, 5097920, 8156672, 10195840, 16313344, 20391680, 40783360, 81566720]

約数ペア:

[(1, 81566720), (2, 40783360), (4, 20391680), (5, 16313344), (8, 10195840), (10, 8156672), (16, 5097920), (20, 4078336), (32, 2548960), (40, 2039168), (64, 1274480), (80, 1019584), (89, 916480), (128, 637240), (160, 509792), (178, 458240), (179, 455680), (256, 318620), (320, 254896), (356, 229120), (358, 227840), (445, 183296), (512, 159310), (640, 127448), (712, 114560), (716, 113920), (890, 91648), (895, 91136), (1024, 79655), (1280, 63724), (1424, 57280), (1432, 56960), (1780, 45824), (1790, 45568), (2560, 31862), (2848, 28640), (2864, 28480), (3560, 22912), (3580, 22784), (5120, 15931), (5696, 14320), (5728, 14240), (7120, 11456), (7160, 11392)]