21642040

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{2089}}^1$

素因数の和:2144

約数の個数: 64

約数和(自身を含む): 57182400

約数和(自身を除く): 35540360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 37, 40, 56, 70, 74, 140, 148, 185, 259, 280, 296, 370, 518, 740, 1036, 1295, 1480, 2072, 2089, 2590, 4178, 5180, 8356, 10360, 10445, 14623, 16712, 20890, 29246, 41780, 58492, 73115, 77293, 83560, 116984, 146230, 154586, 292460, 309172, 386465, 541051, 584920, 618344, 772930, 1082102, 1545860, 2164204, 2705255, 3091720, 4328408, 5410510, 10821020, 21642040]

約数ペア:

[(1, 21642040), (2, 10821020), (4, 5410510), (5, 4328408), (7, 3091720), (8, 2705255), (10, 2164204), (14, 1545860), (20, 1082102), (28, 772930), (35, 618344), (37, 584920), (40, 541051), (56, 386465), (70, 309172), (74, 292460), (140, 154586), (148, 146230), (185, 116984), (259, 83560), (280, 77293), (296, 73115), (370, 58492), (518, 41780), (740, 29246), (1036, 20890), (1295, 16712), (1480, 14623), (2072, 10445), (2089, 10360), (2590, 8356), (4178, 5180)]