19757290

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{61}}^1\times {\mathrm{661}}^1$

素因数の和:743

約数の個数: 48

約数和(自身を含む): 42111144

約数和(自身を除く): 22353854

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 61, 70, 98, 122, 245, 305, 427, 490, 610, 661, 854, 1322, 2135, 2989, 3305, 4270, 4627, 5978, 6610, 9254, 14945, 23135, 29890, 32389, 40321, 46270, 64778, 80642, 161945, 201605, 282247, 323890, 403210, 564494, 1411235, 1975729, 2822470, 3951458, 9878645, 19757290]

約数ペア:

[(1, 19757290), (2, 9878645), (5, 3951458), (7, 2822470), (10, 1975729), (14, 1411235), (35, 564494), (49, 403210), (61, 323890), (70, 282247), (98, 201605), (122, 161945), (245, 80642), (305, 64778), (427, 46270), (490, 40321), (610, 32389), (661, 29890), (854, 23135), (1322, 14945), (2135, 9254), (2989, 6610), (3305, 5978), (4270, 4627)]