21078585940

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{1423}}^1\times {\mathrm{2293}}^1$

素因数の和:3761

約数の個数: 96

約数和(自身を含む): 49391838720

約数和(自身を除く): 28313252780

約数列:

[1, 2, 4, 5, 10, 17, 19, 20, 34, 38, 68, 76, 85, 95, 170, 190, 323, 340, 380, 646, 1292, 1423, 1615, 2293, 2846, 3230, 4586, 5692, 6460, 7115, 9172, 11465, 14230, 22930, 24191, 27037, 28460, 38981, 43567, 45860, 48382, 54074, 77962, 87134, 96764, 108148, 120955, 135185, 155924, 174268, 194905, 217835, 241910, 270370, 389810, 435670, 459629, 483820, 540740, 740639, 779620, 871340, 919258, 1481278, 1838516, 2298145, 2962556, 3262939, 3703195, 4596290, 6525878, 7406390, 9192580, 13051756, 14812780, 16314695, 32629390, 55469963, 61995841, 65258780, 110939926, 123991682, 221879852, 247983364, 277349815, 309979205, 554699630, 619958410, 1053929297, 1109399260, 1239916820, 2107858594, 4215717188, 5269646485, 10539292970, 21078585940]

約数ペア:

[(1, 21078585940), (2, 10539292970), (4, 5269646485), (5, 4215717188), (10, 2107858594), (17, 1239916820), (19, 1109399260), (20, 1053929297), (34, 619958410), (38, 554699630), (68, 309979205), (76, 277349815), (85, 247983364), (95, 221879852), (170, 123991682), (190, 110939926), (323, 65258780), (340, 61995841), (380, 55469963), (646, 32629390), (1292, 16314695), (1423, 14812780), (1615, 13051756), (2293, 9192580), (2846, 7406390), (3230, 6525878), (4586, 4596290), (5692, 3703195), (6460, 3262939), (7115, 2962556), (9172, 2298145), (11465, 1838516), (14230, 1481278), (22930, 919258), (24191, 871340), (27037, 779620), (28460, 740639), (38981, 540740), (43567, 483820), (45860, 459629), (48382, 435670), (54074, 389810), (77962, 270370), (87134, 241910), (96764, 217835), (108148, 194905), (120955, 174268), (135185, 155924)]