19697920

素因数分解:

$2^8\times 5^1\times {\mathrm{11}}^1\times {\mathrm{1399}}^1$

素因数の和:1431

約数の個数: 72

約数和(自身を含む): 51508800

約数和(自身を除く): 31810880

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 64, 80, 88, 110, 128, 160, 176, 220, 256, 320, 352, 440, 640, 704, 880, 1280, 1399, 1408, 1760, 2798, 2816, 3520, 5596, 6995, 7040, 11192, 13990, 14080, 15389, 22384, 27980, 30778, 44768, 55960, 61556, 76945, 89536, 111920, 123112, 153890, 179072, 223840, 246224, 307780, 358144, 447680, 492448, 615560, 895360, 984896, 1231120, 1790720, 1969792, 2462240, 3939584, 4924480, 9848960, 19697920]

約数ペア:

[(1, 19697920), (2, 9848960), (4, 4924480), (5, 3939584), (8, 2462240), (10, 1969792), (11, 1790720), (16, 1231120), (20, 984896), (22, 895360), (32, 615560), (40, 492448), (44, 447680), (55, 358144), (64, 307780), (80, 246224), (88, 223840), (110, 179072), (128, 153890), (160, 123112), (176, 111920), (220, 89536), (256, 76945), (320, 61556), (352, 55960), (440, 44768), (640, 30778), (704, 27980), (880, 22384), (1280, 15389), (1399, 14080), (1408, 13990), (1760, 11192), (2798, 7040), (2816, 6995), (3520, 5596)]