21457156

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{761}}^1$

素因数の和:844

約数の個数: 48

約数和(自身を含む): 46085760

約数和(自身を除く): 24628604

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 53, 76, 106, 133, 212, 266, 371, 532, 742, 761, 1007, 1484, 1522, 2014, 3044, 4028, 5327, 7049, 10654, 14098, 14459, 21308, 28196, 28918, 40333, 57836, 80666, 101213, 161332, 202426, 282331, 404852, 564662, 766327, 1129324, 1532654, 3065308, 5364289, 10728578, 21457156]

約数ペア:

[(1, 21457156), (2, 10728578), (4, 5364289), (7, 3065308), (14, 1532654), (19, 1129324), (28, 766327), (38, 564662), (53, 404852), (76, 282331), (106, 202426), (133, 161332), (212, 101213), (266, 80666), (371, 57836), (532, 40333), (742, 28918), (761, 28196), (1007, 21308), (1484, 14459), (1522, 14098), (2014, 10654), (3044, 7049), (4028, 5327)]