20873853

素因数分解:

$3^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{331}}^1$

素因数の和:375

約数の個数: 72

約数和(自身を含む): 41330016

約数和(自身を除く): 20456163

約数列:

[1, 3, 7, 9, 11, 13, 21, 33, 39, 49, 63, 77, 91, 99, 117, 143, 147, 231, 273, 331, 429, 441, 539, 637, 693, 819, 993, 1001, 1287, 1617, 1911, 2317, 2979, 3003, 3641, 4303, 4851, 5733, 6951, 7007, 9009, 10923, 12909, 16219, 20853, 21021, 25487, 30121, 32769, 38727, 47333, 48657, 63063, 76461, 90363, 141999, 145971, 178409, 210847, 229383, 271089, 331331, 425997, 535227, 632541, 993993, 1605681, 1897623, 2319317, 2981979, 6957951, 20873853]

約数ペア:

[(1, 20873853), (3, 6957951), (7, 2981979), (9, 2319317), (11, 1897623), (13, 1605681), (21, 993993), (33, 632541), (39, 535227), (49, 425997), (63, 331331), (77, 271089), (91, 229383), (99, 210847), (117, 178409), (143, 145971), (147, 141999), (231, 90363), (273, 76461), (331, 63063), (429, 48657), (441, 47333), (539, 38727), (637, 32769), (693, 30121), (819, 25487), (993, 21021), (1001, 20853), (1287, 16219), (1617, 12909), (1911, 10923), (2317, 9009), (2979, 7007), (3003, 6951), (3641, 5733), (4303, 4851)]