21126903

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{83}}^1$

素因数の和:164

約数の個数: 64

約数和(自身を含む): 37158912

約数和(自身を除く): 16032009

約数列:

[1, 3, 7, 17, 21, 23, 31, 51, 69, 83, 93, 119, 161, 217, 249, 357, 391, 483, 527, 581, 651, 713, 1173, 1411, 1581, 1743, 1909, 2139, 2573, 2737, 3689, 4233, 4991, 5727, 7719, 8211, 9877, 11067, 12121, 13363, 14973, 18011, 29631, 32453, 36363, 40089, 43741, 54033, 59179, 84847, 97359, 131223, 177537, 227171, 254541, 306187, 414253, 681513, 918561, 1006043, 1242759, 3018129, 7042301, 21126903]

約数ペア:

[(1, 21126903), (3, 7042301), (7, 3018129), (17, 1242759), (21, 1006043), (23, 918561), (31, 681513), (51, 414253), (69, 306187), (83, 254541), (93, 227171), (119, 177537), (161, 131223), (217, 97359), (249, 84847), (357, 59179), (391, 54033), (483, 43741), (527, 40089), (581, 36363), (651, 32453), (713, 29631), (1173, 18011), (1411, 14973), (1581, 13363), (1743, 12121), (1909, 11067), (2139, 9877), (2573, 8211), (2737, 7719), (3689, 5727), (4233, 4991)]