21400698879

素因数分解:

$3^4\times 7^1\times {\mathrm{37}}^1\times {\mathrm{1020101}}^1$

素因数の和:1020157

約数の個数: 40

約数和(自身を含む): 37523431968

約数和(自身を除く): 16122733089

約数列:

[1, 3, 7, 9, 21, 27, 37, 63, 81, 111, 189, 259, 333, 567, 777, 999, 2331, 2997, 6993, 20979, 1020101, 3060303, 7140707, 9180909, 21422121, 27542727, 37743737, 64266363, 82628181, 113231211, 192799089, 264206159, 339693633, 578397267, 792618477, 1019080899, 2377855431, 3057242697, 7133566293, 21400698879]

約数ペア:

[(1, 21400698879), (3, 7133566293), (7, 3057242697), (9, 2377855431), (21, 1019080899), (27, 792618477), (37, 578397267), (63, 339693633), (81, 264206159), (111, 192799089), (189, 113231211), (259, 82628181), (333, 64266363), (567, 37743737), (777, 27542727), (999, 21422121), (2331, 9180909), (2997, 7140707), (6993, 3060303), (20979, 1020101)]