28207340

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{107}}^1\times {\mathrm{269}}^1$

素因数の和:399

約数の個数: 72

約数和(自身を含む): 69809040

約数和(自身を除く): 41601700

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 107, 140, 196, 214, 245, 269, 428, 490, 535, 538, 749, 980, 1070, 1076, 1345, 1498, 1883, 2140, 2690, 2996, 3745, 3766, 5243, 5380, 7490, 7532, 9415, 10486, 13181, 14980, 18830, 20972, 26215, 26362, 28783, 37660, 52430, 52724, 57566, 65905, 104860, 115132, 131810, 143915, 201481, 263620, 287830, 402962, 575660, 805924, 1007405, 1410367, 2014810, 2820734, 4029620, 5641468, 7051835, 14103670, 28207340]

約数ペア:

[(1, 28207340), (2, 14103670), (4, 7051835), (5, 5641468), (7, 4029620), (10, 2820734), (14, 2014810), (20, 1410367), (28, 1007405), (35, 805924), (49, 575660), (70, 402962), (98, 287830), (107, 263620), (140, 201481), (196, 143915), (214, 131810), (245, 115132), (269, 104860), (428, 65905), (490, 57566), (535, 52724), (538, 52430), (749, 37660), (980, 28783), (1070, 26362), (1076, 26215), (1345, 20972), (1498, 18830), (1883, 14980), (2140, 13181), (2690, 10486), (2996, 9415), (3745, 7532), (3766, 7490), (5243, 5380)]