19900800

素因数分解:

$2^7\times 3^2\times 5^2\times {\mathrm{691}}^1$

素因数の和:721

約数の個数: 144

約数和(自身を含む): 71113380

約数和(自身を除く): 51212580

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 25, 30, 32, 36, 40, 45, 48, 50, 60, 64, 72, 75, 80, 90, 96, 100, 120, 128, 144, 150, 160, 180, 192, 200, 225, 240, 288, 300, 320, 360, 384, 400, 450, 480, 576, 600, 640, 691, 720, 800, 900, 960, 1152, 1200, 1382, 1440, 1600, 1800, 1920, 2073, 2400, 2764, 2880, 3200, 3455, 3600, 4146, 4800, 5528, 5760, 6219, 6910, 7200, 8292, 9600, 10365, 11056, 12438, 13820, 14400, 16584, 17275, 20730, 22112, 24876, 27640, 28800, 31095, 33168, 34550, 41460, 44224, 49752, 51825, 55280, 62190, 66336, 69100, 82920, 88448, 99504, 103650, 110560, 124380, 132672, 138200, 155475, 165840, 199008, 207300, 221120, 248760, 265344, 276400, 310950, 331680, 398016, 414600, 442240, 497520, 552800, 621900, 663360, 796032, 829200, 995040, 1105600, 1243800, 1326720, 1658400, 1990080, 2211200, 2487600, 3316800, 3980160, 4975200, 6633600, 9950400, 19900800]

約数ペア:

[(1, 19900800), (2, 9950400), (3, 6633600), (4, 4975200), (5, 3980160), (6, 3316800), (8, 2487600), (9, 2211200), (10, 1990080), (12, 1658400), (15, 1326720), (16, 1243800), (18, 1105600), (20, 995040), (24, 829200), (25, 796032), (30, 663360), (32, 621900), (36, 552800), (40, 497520), (45, 442240), (48, 414600), (50, 398016), (60, 331680), (64, 310950), (72, 276400), (75, 265344), (80, 248760), (90, 221120), (96, 207300), (100, 199008), (120, 165840), (128, 155475), (144, 138200), (150, 132672), (160, 124380), (180, 110560), (192, 103650), (200, 99504), (225, 88448), (240, 82920), (288, 69100), (300, 66336), (320, 62190), (360, 55280), (384, 51825), (400, 49752), (450, 44224), (480, 41460), (576, 34550), (600, 33168), (640, 31095), (691, 28800), (720, 27640), (800, 24876), (900, 22112), (960, 20730), (1152, 17275), (1200, 16584), (1382, 14400), (1440, 13820), (1600, 12438), (1800, 11056), (1920, 10365), (2073, 9600), (2400, 8292), (2764, 7200), (2880, 6910), (3200, 6219), (3455, 5760), (3600, 5528), (4146, 4800)]