19720960

素因数分解:

$2^8\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1$

素因数の和:130

約数の個数: 144

約数和(自身を含む): 56512512

約数和(自身を除く): 36791552

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 31, 32, 35, 40, 56, 62, 64, 70, 71, 80, 112, 124, 128, 140, 142, 155, 160, 217, 224, 248, 256, 280, 284, 310, 320, 355, 434, 448, 496, 497, 560, 568, 620, 640, 710, 868, 896, 992, 994, 1085, 1120, 1136, 1240, 1280, 1420, 1736, 1792, 1984, 1988, 2170, 2201, 2240, 2272, 2480, 2485, 2840, 3472, 3968, 3976, 4340, 4402, 4480, 4544, 4960, 4970, 5680, 6944, 7936, 7952, 8680, 8804, 8960, 9088, 9920, 9940, 11005, 11360, 13888, 15407, 15904, 17360, 17608, 18176, 19840, 19880, 22010, 22720, 27776, 30814, 31808, 34720, 35216, 39680, 39760, 44020, 45440, 55552, 61628, 63616, 69440, 70432, 77035, 79520, 88040, 90880, 123256, 127232, 138880, 140864, 154070, 159040, 176080, 246512, 277760, 281728, 308140, 318080, 352160, 493024, 563456, 616280, 636160, 704320, 986048, 1232560, 1408640, 1972096, 2465120, 2817280, 3944192, 4930240, 9860480, 19720960]

約数ペア:

[(1, 19720960), (2, 9860480), (4, 4930240), (5, 3944192), (7, 2817280), (8, 2465120), (10, 1972096), (14, 1408640), (16, 1232560), (20, 986048), (28, 704320), (31, 636160), (32, 616280), (35, 563456), (40, 493024), (56, 352160), (62, 318080), (64, 308140), (70, 281728), (71, 277760), (80, 246512), (112, 176080), (124, 159040), (128, 154070), (140, 140864), (142, 138880), (155, 127232), (160, 123256), (217, 90880), (224, 88040), (248, 79520), (256, 77035), (280, 70432), (284, 69440), (310, 63616), (320, 61628), (355, 55552), (434, 45440), (448, 44020), (496, 39760), (497, 39680), (560, 35216), (568, 34720), (620, 31808), (640, 30814), (710, 27776), (868, 22720), (896, 22010), (992, 19880), (994, 19840), (1085, 18176), (1120, 17608), (1136, 17360), (1240, 15904), (1280, 15407), (1420, 13888), (1736, 11360), (1792, 11005), (1984, 9940), (1988, 9920), (2170, 9088), (2201, 8960), (2240, 8804), (2272, 8680), (2480, 7952), (2485, 7936), (2840, 6944), (3472, 5680), (3968, 4970), (3976, 4960), (4340, 4544), (4402, 4480)]