28469980

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{139}}^1$

素因数の和:192

約数の個数: 144

約数和(自身を含む): 80438400

約数和(自身を除く): 51968420

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 19, 20, 22, 28, 35, 38, 44, 49, 55, 70, 76, 77, 95, 98, 110, 133, 139, 140, 154, 190, 196, 209, 220, 245, 266, 278, 308, 380, 385, 418, 490, 532, 539, 556, 665, 695, 770, 836, 931, 973, 980, 1045, 1078, 1330, 1390, 1463, 1529, 1540, 1862, 1946, 2090, 2156, 2641, 2660, 2695, 2780, 2926, 3058, 3724, 3892, 4180, 4655, 4865, 5282, 5390, 5852, 6116, 6811, 7315, 7645, 9310, 9730, 10241, 10564, 10703, 10780, 13205, 13622, 14630, 15290, 18487, 18620, 19460, 20482, 21406, 26410, 27244, 29051, 29260, 30580, 34055, 36974, 40964, 42812, 51205, 52820, 53515, 58102, 68110, 73948, 74921, 92435, 102410, 107030, 116204, 129409, 136220, 145255, 149842, 184870, 203357, 204820, 214060, 258818, 290510, 299684, 369740, 374605, 406714, 517636, 581020, 647045, 749210, 813428, 1016785, 1294090, 1423499, 1498420, 2033570, 2588180, 2846998, 4067140, 5693996, 7117495, 14234990, 28469980]

約数ペア:

[(1, 28469980), (2, 14234990), (4, 7117495), (5, 5693996), (7, 4067140), (10, 2846998), (11, 2588180), (14, 2033570), (19, 1498420), (20, 1423499), (22, 1294090), (28, 1016785), (35, 813428), (38, 749210), (44, 647045), (49, 581020), (55, 517636), (70, 406714), (76, 374605), (77, 369740), (95, 299684), (98, 290510), (110, 258818), (133, 214060), (139, 204820), (140, 203357), (154, 184870), (190, 149842), (196, 145255), (209, 136220), (220, 129409), (245, 116204), (266, 107030), (278, 102410), (308, 92435), (380, 74921), (385, 73948), (418, 68110), (490, 58102), (532, 53515), (539, 52820), (556, 51205), (665, 42812), (695, 40964), (770, 36974), (836, 34055), (931, 30580), (973, 29260), (980, 29051), (1045, 27244), (1078, 26410), (1330, 21406), (1390, 20482), (1463, 19460), (1529, 18620), (1540, 18487), (1862, 15290), (1946, 14630), (2090, 13622), (2156, 13205), (2641, 10780), (2660, 10703), (2695, 10564), (2780, 10241), (2926, 9730), (3058, 9310), (3724, 7645), (3892, 7315), (4180, 6811), (4655, 6116), (4865, 5852), (5282, 5390)]