19781100

素因数分解:

$2^2\times 3^2\times 5^2\times {\mathrm{31}}^1\times {\mathrm{709}}^1$

素因数の和:760

約数の個数: 108

約数和(自身を含む): 64093120

約数和(自身を除く): 44312020

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 25, 30, 31, 36, 45, 50, 60, 62, 75, 90, 93, 100, 124, 150, 155, 180, 186, 225, 279, 300, 310, 372, 450, 465, 558, 620, 709, 775, 900, 930, 1116, 1395, 1418, 1550, 1860, 2127, 2325, 2790, 2836, 3100, 3545, 4254, 4650, 5580, 6381, 6975, 7090, 8508, 9300, 10635, 12762, 13950, 14180, 17725, 21270, 21979, 25524, 27900, 31905, 35450, 42540, 43958, 53175, 63810, 65937, 70900, 87916, 106350, 109895, 127620, 131874, 159525, 197811, 212700, 219790, 263748, 319050, 329685, 395622, 439580, 549475, 638100, 659370, 791244, 989055, 1098950, 1318740, 1648425, 1978110, 2197900, 3296850, 3956220, 4945275, 6593700, 9890550, 19781100]

約数ペア:

[(1, 19781100), (2, 9890550), (3, 6593700), (4, 4945275), (5, 3956220), (6, 3296850), (9, 2197900), (10, 1978110), (12, 1648425), (15, 1318740), (18, 1098950), (20, 989055), (25, 791244), (30, 659370), (31, 638100), (36, 549475), (45, 439580), (50, 395622), (60, 329685), (62, 319050), (75, 263748), (90, 219790), (93, 212700), (100, 197811), (124, 159525), (150, 131874), (155, 127620), (180, 109895), (186, 106350), (225, 87916), (279, 70900), (300, 65937), (310, 63810), (372, 53175), (450, 43958), (465, 42540), (558, 35450), (620, 31905), (709, 27900), (775, 25524), (900, 21979), (930, 21270), (1116, 17725), (1395, 14180), (1418, 13950), (1550, 12762), (1860, 10635), (2127, 9300), (2325, 8508), (2790, 7090), (2836, 6975), (3100, 6381), (3545, 5580), (4254, 4650)]