21069909

素因数分解:

$3^3\times 7^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{131}}^1$

素因数の和:207

約数の個数: 64

約数和(自身を含む): 38522880

約数和(自身を除く): 17452971

約数列:

[1, 3, 7, 9, 21, 23, 27, 37, 63, 69, 111, 131, 161, 189, 207, 259, 333, 393, 483, 621, 777, 851, 917, 999, 1179, 1449, 2331, 2553, 2751, 3013, 3537, 4347, 4847, 5957, 6993, 7659, 8253, 9039, 14541, 17871, 21091, 22977, 24759, 27117, 33929, 43623, 53613, 63273, 81351, 101787, 111481, 130869, 160839, 189819, 305361, 334443, 569457, 780367, 916083, 1003329, 2341101, 3009987, 7023303, 21069909]

約数ペア:

[(1, 21069909), (3, 7023303), (7, 3009987), (9, 2341101), (21, 1003329), (23, 916083), (27, 780367), (37, 569457), (63, 334443), (69, 305361), (111, 189819), (131, 160839), (161, 130869), (189, 111481), (207, 101787), (259, 81351), (333, 63273), (393, 53613), (483, 43623), (621, 33929), (777, 27117), (851, 24759), (917, 22977), (999, 21091), (1179, 17871), (1449, 14541), (2331, 9039), (2553, 8253), (2751, 7659), (3013, 6993), (3537, 5957), (4347, 4847)]