21821690

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{197}}^1$

素因数の和:287

約数の個数: 64

約数和(自身を含む): 46189440

約数和(自身を除く): 24367750

約数列:

[1, 2, 5, 10, 11, 19, 22, 38, 53, 55, 95, 106, 110, 190, 197, 209, 265, 394, 418, 530, 583, 985, 1007, 1045, 1166, 1970, 2014, 2090, 2167, 2915, 3743, 4334, 5035, 5830, 7486, 10070, 10441, 10835, 11077, 18715, 20882, 21670, 22154, 37430, 41173, 52205, 55385, 82346, 104410, 110770, 114851, 198379, 205865, 229702, 396758, 411730, 574255, 991895, 1148510, 1983790, 2182169, 4364338, 10910845, 21821690]

約数ペア:

[(1, 21821690), (2, 10910845), (5, 4364338), (10, 2182169), (11, 1983790), (19, 1148510), (22, 991895), (38, 574255), (53, 411730), (55, 396758), (95, 229702), (106, 205865), (110, 198379), (190, 114851), (197, 110770), (209, 104410), (265, 82346), (394, 55385), (418, 52205), (530, 41173), (583, 37430), (985, 22154), (1007, 21670), (1045, 20882), (1166, 18715), (1970, 11077), (2014, 10835), (2090, 10441), (2167, 10070), (2915, 7486), (3743, 5830), (4334, 5035)]