81111040

素因数分解:

$2^{11}\times 5^1\times {\mathrm{89}}^2$

素因数の和:205

約数の個数: 72

約数和(自身を含む): 196830270

約数和(自身を除く): 115719230

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 89, 128, 160, 178, 256, 320, 356, 445, 512, 640, 712, 890, 1024, 1280, 1424, 1780, 2048, 2560, 2848, 3560, 5120, 5696, 7120, 7921, 10240, 11392, 14240, 15842, 22784, 28480, 31684, 39605, 45568, 56960, 63368, 79210, 91136, 113920, 126736, 158420, 182272, 227840, 253472, 316840, 455680, 506944, 633680, 911360, 1013888, 1267360, 2027776, 2534720, 4055552, 5069440, 8111104, 10138880, 16222208, 20277760, 40555520, 81111040]

約数ペア:

[(1, 81111040), (2, 40555520), (4, 20277760), (5, 16222208), (8, 10138880), (10, 8111104), (16, 5069440), (20, 4055552), (32, 2534720), (40, 2027776), (64, 1267360), (80, 1013888), (89, 911360), (128, 633680), (160, 506944), (178, 455680), (256, 316840), (320, 253472), (356, 227840), (445, 182272), (512, 158420), (640, 126736), (712, 113920), (890, 91136), (1024, 79210), (1280, 63368), (1424, 56960), (1780, 45568), (2048, 39605), (2560, 31684), (2848, 28480), (3560, 22784), (5120, 15842), (5696, 14240), (7120, 11392), (7921, 10240)]