21018889456

素因数分解:

$2^4\times {\mathrm{67}}^1\times {\mathrm{83}}^1\times {\mathrm{236231}}^1$

素因数の和:236389

約数の個数: 40

約数和(自身を含む): 41830072704

約数和(自身を除く): 20811183248

約数列:

[1, 2, 4, 8, 16, 67, 83, 134, 166, 268, 332, 536, 664, 1072, 1328, 5561, 11122, 22244, 44488, 88976, 236231, 472462, 944924, 1889848, 3779696, 15827477, 19607173, 31654954, 39214346, 63309908, 78428692, 126619816, 156857384, 253239632, 313714768, 1313680591, 2627361182, 5254722364, 10509444728, 21018889456]

約数ペア:

[(1, 21018889456), (2, 10509444728), (4, 5254722364), (8, 2627361182), (16, 1313680591), (67, 313714768), (83, 253239632), (134, 156857384), (166, 126619816), (268, 78428692), (332, 63309908), (536, 39214346), (664, 31654954), (1072, 19607173), (1328, 15827477), (5561, 3779696), (11122, 1889848), (22244, 944924), (44488, 472462), (88976, 236231)]