81391450

素因数分解:

$2^1\times 5^2\times 7^2\times {\mathrm{139}}^1\times {\mathrm{239}}^1$

素因数の和:404

約数の個数: 72

約数和(自身を含む): 178113600

約数和(自身を除く): 96722150

約数列:

[1, 2, 5, 7, 10, 14, 25, 35, 49, 50, 70, 98, 139, 175, 239, 245, 278, 350, 478, 490, 695, 973, 1195, 1225, 1390, 1673, 1946, 2390, 2450, 3346, 3475, 4865, 5975, 6811, 6950, 8365, 9730, 11711, 11950, 13622, 16730, 23422, 24325, 33221, 34055, 41825, 48650, 58555, 66442, 68110, 83650, 117110, 166105, 170275, 232547, 292775, 332210, 340550, 465094, 585550, 830525, 1162735, 1627829, 1661050, 2325470, 3255658, 5813675, 8139145, 11627350, 16278290, 40695725, 81391450]

約数ペア:

[(1, 81391450), (2, 40695725), (5, 16278290), (7, 11627350), (10, 8139145), (14, 5813675), (25, 3255658), (35, 2325470), (49, 1661050), (50, 1627829), (70, 1162735), (98, 830525), (139, 585550), (175, 465094), (239, 340550), (245, 332210), (278, 292775), (350, 232547), (478, 170275), (490, 166105), (695, 117110), (973, 83650), (1195, 68110), (1225, 66442), (1390, 58555), (1673, 48650), (1946, 41825), (2390, 34055), (2450, 33221), (3346, 24325), (3475, 23422), (4865, 16730), (5975, 13622), (6811, 11950), (6950, 11711), (8365, 9730)]