20921373

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{401}}^1$

素因数の和:466

約数の個数: 48

約数和(自身を含む): 36122112

約数和(自身を除く): 15200739

約数列:

[1, 3, 9, 11, 17, 31, 33, 51, 93, 99, 153, 187, 279, 341, 401, 527, 561, 1023, 1203, 1581, 1683, 3069, 3609, 4411, 4743, 5797, 6817, 12431, 13233, 17391, 20451, 37293, 39699, 52173, 61353, 74987, 111879, 136741, 211327, 224961, 410223, 633981, 674883, 1230669, 1901943, 2324597, 6973791, 20921373]

約数ペア:

[(1, 20921373), (3, 6973791), (9, 2324597), (11, 1901943), (17, 1230669), (31, 674883), (33, 633981), (51, 410223), (93, 224961), (99, 211327), (153, 136741), (187, 111879), (279, 74987), (341, 61353), (401, 52173), (527, 39699), (561, 37293), (1023, 20451), (1203, 17391), (1581, 13233), (1683, 12431), (3069, 6817), (3609, 5797), (4411, 4743)]