21559538

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^3\times {\mathrm{13}}^1\times {\mathrm{89}}^1$

素因数の和:144

約数の個数: 64

約数和(自身を含む): 44271360

約数和(自身を除く): 22711822

約数列:

[1, 2, 7, 11, 13, 14, 22, 26, 77, 89, 91, 121, 143, 154, 178, 182, 242, 286, 623, 847, 979, 1001, 1157, 1246, 1331, 1573, 1694, 1958, 2002, 2314, 2662, 3146, 6853, 8099, 9317, 10769, 11011, 12727, 13706, 16198, 17303, 18634, 21538, 22022, 25454, 34606, 75383, 89089, 118459, 121121, 139997, 150766, 178178, 236918, 242242, 279994, 829213, 979979, 1539967, 1658426, 1959958, 3079934, 10779769, 21559538]

約数ペア:

[(1, 21559538), (2, 10779769), (7, 3079934), (11, 1959958), (13, 1658426), (14, 1539967), (22, 979979), (26, 829213), (77, 279994), (89, 242242), (91, 236918), (121, 178178), (143, 150766), (154, 139997), (178, 121121), (182, 118459), (242, 89089), (286, 75383), (623, 34606), (847, 25454), (979, 22022), (1001, 21538), (1157, 18634), (1246, 17303), (1331, 16198), (1573, 13706), (1694, 12727), (1958, 11011), (2002, 10769), (2314, 9317), (2662, 8099), (3146, 6853)]