20385920

素因数分解:

$2^7\times 5^1\times {\mathrm{53}}^1\times {\mathrm{601}}^1$

素因数の和:673

約数の個数: 64

約数和(自身を含む): 49737240

約数和(自身を除く): 29351320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 53, 64, 80, 106, 128, 160, 212, 265, 320, 424, 530, 601, 640, 848, 1060, 1202, 1696, 2120, 2404, 3005, 3392, 4240, 4808, 6010, 6784, 8480, 9616, 12020, 16960, 19232, 24040, 31853, 33920, 38464, 48080, 63706, 76928, 96160, 127412, 159265, 192320, 254824, 318530, 384640, 509648, 637060, 1019296, 1274120, 2038592, 2548240, 4077184, 5096480, 10192960, 20385920]

約数ペア:

[(1, 20385920), (2, 10192960), (4, 5096480), (5, 4077184), (8, 2548240), (10, 2038592), (16, 1274120), (20, 1019296), (32, 637060), (40, 509648), (53, 384640), (64, 318530), (80, 254824), (106, 192320), (128, 159265), (160, 127412), (212, 96160), (265, 76928), (320, 63706), (424, 48080), (530, 38464), (601, 33920), (640, 31853), (848, 24040), (1060, 19232), (1202, 16960), (1696, 12020), (2120, 9616), (2404, 8480), (3005, 6784), (3392, 6010), (4240, 4808)]