28538380

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{109}}^1$

素因数の和:203

約数の個数: 96

約数和(自身を含む): 69854400

約数和(自身を除く): 41316020

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 38, 52, 53, 65, 76, 95, 106, 109, 130, 190, 212, 218, 247, 260, 265, 380, 436, 494, 530, 545, 689, 988, 1007, 1060, 1090, 1235, 1378, 1417, 2014, 2071, 2180, 2470, 2756, 2834, 3445, 4028, 4142, 4940, 5035, 5668, 5777, 6890, 7085, 8284, 10070, 10355, 11554, 13091, 13780, 14170, 20140, 20710, 23108, 26182, 26923, 28340, 28885, 41420, 52364, 53846, 57770, 65455, 75101, 107692, 109763, 115540, 130910, 134615, 150202, 219526, 261820, 269230, 300404, 375505, 439052, 538460, 548815, 751010, 1097630, 1426919, 1502020, 2195260, 2853838, 5707676, 7134595, 14269190, 28538380]

約数ペア:

[(1, 28538380), (2, 14269190), (4, 7134595), (5, 5707676), (10, 2853838), (13, 2195260), (19, 1502020), (20, 1426919), (26, 1097630), (38, 751010), (52, 548815), (53, 538460), (65, 439052), (76, 375505), (95, 300404), (106, 269230), (109, 261820), (130, 219526), (190, 150202), (212, 134615), (218, 130910), (247, 115540), (260, 109763), (265, 107692), (380, 75101), (436, 65455), (494, 57770), (530, 53846), (545, 52364), (689, 41420), (988, 28885), (1007, 28340), (1060, 26923), (1090, 26182), (1235, 23108), (1378, 20710), (1417, 20140), (2014, 14170), (2071, 13780), (2180, 13091), (2470, 11554), (2756, 10355), (2834, 10070), (3445, 8284), (4028, 7085), (4142, 6890), (4940, 5777), (5035, 5668)]