21290972

素因数分解:

$2^2\times {\mathrm{41}}^1\times {\mathrm{197}}^1\times {\mathrm{659}}^1$

素因数の和:901

約数の個数: 24

約数和(自身を含む): 38419920

約数和(自身を除く): 17128948

約数列:

[1, 2, 4, 41, 82, 164, 197, 394, 659, 788, 1318, 2636, 8077, 16154, 27019, 32308, 54038, 108076, 129823, 259646, 519292, 5322743, 10645486, 21290972]

約数ペア:

[(1, 21290972), (2, 10645486), (4, 5322743), (41, 519292), (82, 259646), (164, 129823), (197, 108076), (394, 54038), (659, 32308), (788, 27019), (1318, 16154), (2636, 8077)]