28205835

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{59}}^1\times {\mathrm{157}}^1$

素因数の和:260

約数の個数: 64

約数和(自身を含む): 54604800

約数和(自身を除く): 26398965

約数列:

[1, 3, 5, 7, 15, 21, 29, 35, 59, 87, 105, 145, 157, 177, 203, 295, 413, 435, 471, 609, 785, 885, 1015, 1099, 1239, 1711, 2065, 2355, 3045, 3297, 4553, 5133, 5495, 6195, 8555, 9263, 11977, 13659, 16485, 22765, 25665, 27789, 31871, 35931, 46315, 59885, 64841, 68295, 95613, 138945, 159355, 179655, 194523, 268627, 324205, 478065, 805881, 972615, 1343135, 1880389, 4029405, 5641167, 9401945, 28205835]

約数ペア:

[(1, 28205835), (3, 9401945), (5, 5641167), (7, 4029405), (15, 1880389), (21, 1343135), (29, 972615), (35, 805881), (59, 478065), (87, 324205), (105, 268627), (145, 194523), (157, 179655), (177, 159355), (203, 138945), (295, 95613), (413, 68295), (435, 64841), (471, 59885), (609, 46315), (785, 35931), (885, 31871), (1015, 27789), (1099, 25665), (1239, 22765), (1711, 16485), (2065, 13659), (2355, 11977), (3045, 9263), (3297, 8555), (4553, 6195), (5133, 5495)]