20277760

素因数分解:

$2^9\times 5^1\times {\mathrm{89}}^2$

素因数の和:201

約数の個数: 60

約数和(自身を含む): 49171518

約数和(自身を除く): 28893758

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, 1280, 1424, 1780, 2560, 2848, 3560, 5696, 7120, 7921, 11392, 14240, 15842, 22784, 28480, 31684, 39605, 45568, 56960, 63368, 79210, 113920, 126736, 158420, 227840, 253472, 316840, 506944, 633680, 1013888, 1267360, 2027776, 2534720, 4055552, 5069440, 10138880, 20277760]

約数ペア:

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