21489380

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{97}}^1$

素因数の和:189

約数の個数: 96

約数和(自身を含む): 53343360

約数和(自身を除く): 31853980

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 38, 44, 53, 55, 76, 95, 97, 106, 110, 190, 194, 209, 212, 220, 265, 380, 388, 418, 485, 530, 583, 836, 970, 1007, 1045, 1060, 1067, 1166, 1843, 1940, 2014, 2090, 2134, 2332, 2915, 3686, 4028, 4180, 4268, 5035, 5141, 5335, 5830, 7372, 9215, 10070, 10282, 10670, 11077, 11660, 18430, 20140, 20273, 20564, 21340, 22154, 25705, 36860, 40546, 44308, 51410, 55385, 56551, 81092, 97679, 101365, 102820, 110770, 113102, 195358, 202730, 221540, 226204, 282755, 390716, 405460, 488395, 565510, 976790, 1074469, 1131020, 1953580, 2148938, 4297876, 5372345, 10744690, 21489380]

約数ペア:

[(1, 21489380), (2, 10744690), (4, 5372345), (5, 4297876), (10, 2148938), (11, 1953580), (19, 1131020), (20, 1074469), (22, 976790), (38, 565510), (44, 488395), (53, 405460), (55, 390716), (76, 282755), (95, 226204), (97, 221540), (106, 202730), (110, 195358), (190, 113102), (194, 110770), (209, 102820), (212, 101365), (220, 97679), (265, 81092), (380, 56551), (388, 55385), (418, 51410), (485, 44308), (530, 40546), (583, 36860), (836, 25705), (970, 22154), (1007, 21340), (1045, 20564), (1060, 20273), (1067, 20140), (1166, 18430), (1843, 11660), (1940, 11077), (2014, 10670), (2090, 10282), (2134, 10070), (2332, 9215), (2915, 7372), (3686, 5830), (4028, 5335), (4180, 5141), (4268, 5035)]