20521600

素因数分解:

$2^7\times 5^2\times {\mathrm{11}}^2\times {\mathrm{53}}^1$

素因数の和:99

約数の個数: 144

約数和(自身を含む): 56773710

約数和(自身を除く): 36252110

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 25, 32, 40, 44, 50, 53, 55, 64, 80, 88, 100, 106, 110, 121, 128, 160, 176, 200, 212, 220, 242, 265, 275, 320, 352, 400, 424, 440, 484, 530, 550, 583, 605, 640, 704, 800, 848, 880, 968, 1060, 1100, 1166, 1210, 1325, 1408, 1600, 1696, 1760, 1936, 2120, 2200, 2332, 2420, 2650, 2915, 3025, 3200, 3392, 3520, 3872, 4240, 4400, 4664, 4840, 5300, 5830, 6050, 6413, 6784, 7040, 7744, 8480, 8800, 9328, 9680, 10600, 11660, 12100, 12826, 14575, 15488, 16960, 17600, 18656, 19360, 21200, 23320, 24200, 25652, 29150, 32065, 33920, 35200, 37312, 38720, 42400, 46640, 48400, 51304, 58300, 64130, 74624, 77440, 84800, 93280, 96800, 102608, 116600, 128260, 160325, 169600, 186560, 193600, 205216, 233200, 256520, 320650, 373120, 387200, 410432, 466400, 513040, 641300, 820864, 932800, 1026080, 1282600, 1865600, 2052160, 2565200, 4104320, 5130400, 10260800, 20521600]

約数ペア:

[(1, 20521600), (2, 10260800), (4, 5130400), (5, 4104320), (8, 2565200), (10, 2052160), (11, 1865600), (16, 1282600), (20, 1026080), (22, 932800), (25, 820864), (32, 641300), (40, 513040), (44, 466400), (50, 410432), (53, 387200), (55, 373120), (64, 320650), (80, 256520), (88, 233200), (100, 205216), (106, 193600), (110, 186560), (121, 169600), (128, 160325), (160, 128260), (176, 116600), (200, 102608), (212, 96800), (220, 93280), (242, 84800), (265, 77440), (275, 74624), (320, 64130), (352, 58300), (400, 51304), (424, 48400), (440, 46640), (484, 42400), (530, 38720), (550, 37312), (583, 35200), (605, 33920), (640, 32065), (704, 29150), (800, 25652), (848, 24200), (880, 23320), (968, 21200), (1060, 19360), (1100, 18656), (1166, 17600), (1210, 16960), (1325, 15488), (1408, 14575), (1600, 12826), (1696, 12100), (1760, 11660), (1936, 10600), (2120, 9680), (2200, 9328), (2332, 8800), (2420, 8480), (2650, 7744), (2915, 7040), (3025, 6784), (3200, 6413), (3392, 6050), (3520, 5830), (3872, 5300), (4240, 4840), (4400, 4664)]