81123520

素因数分解:

$2^6\times 5^1\times {\mathrm{79}}^1\times {\mathrm{3209}}^1$

素因数の和:3305

約数の個数: 56

約数和(自身を含む): 195681600

約数和(自身を除く): 114558080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 79, 80, 158, 160, 316, 320, 395, 632, 790, 1264, 1580, 2528, 3160, 3209, 5056, 6320, 6418, 12640, 12836, 16045, 25280, 25672, 32090, 51344, 64180, 102688, 128360, 205376, 253511, 256720, 507022, 513440, 1014044, 1026880, 1267555, 2028088, 2535110, 4056176, 5070220, 8112352, 10140440, 16224704, 20280880, 40561760, 81123520]

約数ペア:

[(1, 81123520), (2, 40561760), (4, 20280880), (5, 16224704), (8, 10140440), (10, 8112352), (16, 5070220), (20, 4056176), (32, 2535110), (40, 2028088), (64, 1267555), (79, 1026880), (80, 1014044), (158, 513440), (160, 507022), (316, 256720), (320, 253511), (395, 205376), (632, 128360), (790, 102688), (1264, 64180), (1580, 51344), (2528, 32090), (3160, 25672), (3209, 25280), (5056, 16045), (6320, 12836), (6418, 12640)]