20497920

素因数分解:

$2^9\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{157}}^1$

素因数の和:200

約数の個数: 160

約数和(自身を含む): 69825888

約数和(自身を除く): 49327968

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 17, 20, 24, 30, 32, 34, 40, 48, 51, 60, 64, 68, 80, 85, 96, 102, 120, 128, 136, 157, 160, 170, 192, 204, 240, 255, 256, 272, 314, 320, 340, 384, 408, 471, 480, 510, 512, 544, 628, 640, 680, 768, 785, 816, 942, 960, 1020, 1088, 1256, 1280, 1360, 1536, 1570, 1632, 1884, 1920, 2040, 2176, 2355, 2512, 2560, 2669, 2720, 3140, 3264, 3768, 3840, 4080, 4352, 4710, 5024, 5338, 5440, 6280, 6528, 7536, 7680, 8007, 8160, 8704, 9420, 10048, 10676, 10880, 12560, 13056, 13345, 15072, 16014, 16320, 18840, 20096, 21352, 21760, 25120, 26112, 26690, 30144, 32028, 32640, 37680, 40035, 40192, 42704, 43520, 50240, 53380, 60288, 64056, 65280, 75360, 80070, 80384, 85408, 100480, 106760, 120576, 128112, 130560, 150720, 160140, 170816, 200960, 213520, 241152, 256224, 301440, 320280, 341632, 401920, 427040, 512448, 602880, 640560, 683264, 854080, 1024896, 1205760, 1281120, 1366528, 1708160, 2049792, 2562240, 3416320, 4099584, 5124480, 6832640, 10248960, 20497920]

約数ペア:

[(1, 20497920), (2, 10248960), (3, 6832640), (4, 5124480), (5, 4099584), (6, 3416320), (8, 2562240), (10, 2049792), (12, 1708160), (15, 1366528), (16, 1281120), (17, 1205760), (20, 1024896), (24, 854080), (30, 683264), (32, 640560), (34, 602880), (40, 512448), (48, 427040), (51, 401920), (60, 341632), (64, 320280), (68, 301440), (80, 256224), (85, 241152), (96, 213520), (102, 200960), (120, 170816), (128, 160140), (136, 150720), (157, 130560), (160, 128112), (170, 120576), (192, 106760), (204, 100480), (240, 85408), (255, 80384), (256, 80070), (272, 75360), (314, 65280), (320, 64056), (340, 60288), (384, 53380), (408, 50240), (471, 43520), (480, 42704), (510, 40192), (512, 40035), (544, 37680), (628, 32640), (640, 32028), (680, 30144), (768, 26690), (785, 26112), (816, 25120), (942, 21760), (960, 21352), (1020, 20096), (1088, 18840), (1256, 16320), (1280, 16014), (1360, 15072), (1536, 13345), (1570, 13056), (1632, 12560), (1884, 10880), (1920, 10676), (2040, 10048), (2176, 9420), (2355, 8704), (2512, 8160), (2560, 8007), (2669, 7680), (2720, 7536), (3140, 6528), (3264, 6280), (3768, 5440), (3840, 5338), (4080, 5024), (4352, 4710)]