28297720

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{73}}^1\times {\mathrm{881}}^1$

素因数の和:976

約数の個数: 64

約数和(自身を含む): 70489440

約数和(自身を除く): 42191720

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 73, 88, 110, 146, 220, 292, 365, 440, 584, 730, 803, 881, 1460, 1606, 1762, 2920, 3212, 3524, 4015, 4405, 6424, 7048, 8030, 8810, 9691, 16060, 17620, 19382, 32120, 35240, 38764, 48455, 64313, 77528, 96910, 128626, 193820, 257252, 321565, 387640, 514504, 643130, 707443, 1286260, 1414886, 2572520, 2829772, 3537215, 5659544, 7074430, 14148860, 28297720]

約数ペア:

[(1, 28297720), (2, 14148860), (4, 7074430), (5, 5659544), (8, 3537215), (10, 2829772), (11, 2572520), (20, 1414886), (22, 1286260), (40, 707443), (44, 643130), (55, 514504), (73, 387640), (88, 321565), (110, 257252), (146, 193820), (220, 128626), (292, 96910), (365, 77528), (440, 64313), (584, 48455), (730, 38764), (803, 35240), (881, 32120), (1460, 19382), (1606, 17620), (1762, 16060), (2920, 9691), (3212, 8810), (3524, 8030), (4015, 7048), (4405, 6424)]