21089565

素因数分解:

$3^4\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{173}}^1$

素因数の和:240

約数の個数: 80

約数和(自身を含む): 44466048

約数和(自身を除く): 23376483

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 43, 45, 63, 81, 105, 129, 135, 173, 189, 215, 301, 315, 387, 405, 519, 567, 645, 865, 903, 945, 1161, 1211, 1505, 1557, 1935, 2595, 2709, 2835, 3483, 3633, 4515, 4671, 5805, 6055, 7439, 7785, 8127, 10899, 13545, 14013, 17415, 18165, 22317, 23355, 24381, 32697, 37195, 40635, 52073, 54495, 66951, 70065, 98091, 111585, 121905, 156219, 163485, 200853, 260365, 334755, 468657, 490455, 602559, 781095, 1004265, 1405971, 2343285, 3012795, 4217913, 7029855, 21089565]

約数ペア:

[(1, 21089565), (3, 7029855), (5, 4217913), (7, 3012795), (9, 2343285), (15, 1405971), (21, 1004265), (27, 781095), (35, 602559), (43, 490455), (45, 468657), (63, 334755), (81, 260365), (105, 200853), (129, 163485), (135, 156219), (173, 121905), (189, 111585), (215, 98091), (301, 70065), (315, 66951), (387, 54495), (405, 52073), (519, 40635), (567, 37195), (645, 32697), (865, 24381), (903, 23355), (945, 22317), (1161, 18165), (1211, 17415), (1505, 14013), (1557, 13545), (1935, 10899), (2595, 8127), (2709, 7785), (2835, 7439), (3483, 6055), (3633, 5805), (4515, 4671)]