20042720

素因数分解:

$2^5\times 5^1\times {\mathrm{19}}^2\times {\mathrm{347}}^1$

素因数の和:400

約数の個数: 72

約数和(自身を含む): 50118264

約数和(自身を除く): 30075544

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 76, 80, 95, 152, 160, 190, 304, 347, 361, 380, 608, 694, 722, 760, 1388, 1444, 1520, 1735, 1805, 2776, 2888, 3040, 3470, 3610, 5552, 5776, 6593, 6940, 7220, 11104, 11552, 13186, 13880, 14440, 26372, 27760, 28880, 32965, 52744, 55520, 57760, 65930, 105488, 125267, 131860, 210976, 250534, 263720, 501068, 527440, 626335, 1002136, 1054880, 1252670, 2004272, 2505340, 4008544, 5010680, 10021360, 20042720]

約数ペア:

[(1, 20042720), (2, 10021360), (4, 5010680), (5, 4008544), (8, 2505340), (10, 2004272), (16, 1252670), (19, 1054880), (20, 1002136), (32, 626335), (38, 527440), (40, 501068), (76, 263720), (80, 250534), (95, 210976), (152, 131860), (160, 125267), (190, 105488), (304, 65930), (347, 57760), (361, 55520), (380, 52744), (608, 32965), (694, 28880), (722, 27760), (760, 26372), (1388, 14440), (1444, 13880), (1520, 13186), (1735, 11552), (1805, 11104), (2776, 7220), (2888, 6940), (3040, 6593), (3470, 5776), (3610, 5552)]