21125390

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1$

素因数の和:138

約数の個数: 96

約数和(自身を含む): 48263040

約数和(自身を除く): 27137650

約数列:

[1, 2, 5, 10, 11, 13, 17, 22, 26, 34, 55, 65, 79, 85, 110, 121, 130, 143, 158, 170, 187, 221, 242, 286, 374, 395, 442, 605, 715, 790, 869, 935, 1027, 1105, 1210, 1343, 1430, 1573, 1738, 1870, 2054, 2057, 2210, 2431, 2686, 3146, 4114, 4345, 4862, 5135, 6715, 7865, 8690, 9559, 10270, 10285, 11297, 12155, 13430, 14773, 15730, 17459, 19118, 20570, 22594, 24310, 26741, 29546, 34918, 47795, 53482, 56485, 73865, 87295, 95590, 112970, 124267, 133705, 147730, 162503, 174590, 192049, 248534, 267410, 325006, 384098, 621335, 812515, 960245, 1242670, 1625030, 1920490, 2112539, 4225078, 10562695, 21125390]

約数ペア:

[(1, 21125390), (2, 10562695), (5, 4225078), (10, 2112539), (11, 1920490), (13, 1625030), (17, 1242670), (22, 960245), (26, 812515), (34, 621335), (55, 384098), (65, 325006), (79, 267410), (85, 248534), (110, 192049), (121, 174590), (130, 162503), (143, 147730), (158, 133705), (170, 124267), (187, 112970), (221, 95590), (242, 87295), (286, 73865), (374, 56485), (395, 53482), (442, 47795), (605, 34918), (715, 29546), (790, 26741), (869, 24310), (935, 22594), (1027, 20570), (1105, 19118), (1210, 17459), (1343, 15730), (1430, 14773), (1573, 13430), (1738, 12155), (1870, 11297), (2054, 10285), (2057, 10270), (2210, 9559), (2431, 8690), (2686, 7865), (3146, 6715), (4114, 5135), (4345, 4862)]