19778000

素因数分解:

$2^4\times 5^3\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1$

素因数の和:94

約数の個数: 160

約数和(自身を含む): 55710720

約数和(自身を除く): 35932720

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 25, 29, 31, 40, 44, 50, 55, 58, 62, 80, 88, 100, 110, 116, 124, 125, 145, 155, 176, 200, 220, 232, 248, 250, 275, 290, 310, 319, 341, 400, 440, 464, 496, 500, 550, 580, 620, 638, 682, 725, 775, 880, 899, 1000, 1100, 1160, 1240, 1276, 1364, 1375, 1450, 1550, 1595, 1705, 1798, 2000, 2200, 2320, 2480, 2552, 2728, 2750, 2900, 3100, 3190, 3410, 3596, 3625, 3875, 4400, 4495, 5104, 5456, 5500, 5800, 6200, 6380, 6820, 7192, 7250, 7750, 7975, 8525, 8990, 9889, 11000, 11600, 12400, 12760, 13640, 14384, 14500, 15500, 15950, 17050, 17980, 19778, 22000, 22475, 25520, 27280, 29000, 31000, 31900, 34100, 35960, 39556, 39875, 42625, 44950, 49445, 58000, 62000, 63800, 68200, 71920, 79112, 79750, 85250, 89900, 98890, 112375, 127600, 136400, 158224, 159500, 170500, 179800, 197780, 224750, 247225, 319000, 341000, 359600, 395560, 449500, 494450, 638000, 682000, 791120, 899000, 988900, 1236125, 1798000, 1977800, 2472250, 3955600, 4944500, 9889000, 19778000]

約数ペア:

[(1, 19778000), (2, 9889000), (4, 4944500), (5, 3955600), (8, 2472250), (10, 1977800), (11, 1798000), (16, 1236125), (20, 988900), (22, 899000), (25, 791120), (29, 682000), (31, 638000), (40, 494450), (44, 449500), (50, 395560), (55, 359600), (58, 341000), (62, 319000), (80, 247225), (88, 224750), (100, 197780), (110, 179800), (116, 170500), (124, 159500), (125, 158224), (145, 136400), (155, 127600), (176, 112375), (200, 98890), (220, 89900), (232, 85250), (248, 79750), (250, 79112), (275, 71920), (290, 68200), (310, 63800), (319, 62000), (341, 58000), (400, 49445), (440, 44950), (464, 42625), (496, 39875), (500, 39556), (550, 35960), (580, 34100), (620, 31900), (638, 31000), (682, 29000), (725, 27280), (775, 25520), (880, 22475), (899, 22000), (1000, 19778), (1100, 17980), (1160, 17050), (1240, 15950), (1276, 15500), (1364, 14500), (1375, 14384), (1450, 13640), (1550, 12760), (1595, 12400), (1705, 11600), (1798, 11000), (2000, 9889), (2200, 8990), (2320, 8525), (2480, 7975), (2552, 7750), (2728, 7250), (2750, 7192), (2900, 6820), (3100, 6380), (3190, 6200), (3410, 5800), (3596, 5500), (3625, 5456), (3875, 5104), (4400, 4495)]