19899520

素因数分解:

$2^7\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{59}}^1$

素因数の和:126

約数の個数: 128

約数和(自身を含む): 52876800

約数和(自身を除く): 32977280

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 31, 32, 34, 40, 59, 62, 64, 68, 80, 85, 118, 124, 128, 136, 155, 160, 170, 236, 248, 272, 295, 310, 320, 340, 472, 496, 527, 544, 590, 620, 640, 680, 944, 992, 1003, 1054, 1088, 1180, 1240, 1360, 1829, 1888, 1984, 2006, 2108, 2176, 2360, 2480, 2635, 2720, 3658, 3776, 3968, 4012, 4216, 4720, 4960, 5015, 5270, 5440, 7316, 7552, 8024, 8432, 9145, 9440, 9920, 10030, 10540, 10880, 14632, 16048, 16864, 18290, 18880, 19840, 20060, 21080, 29264, 31093, 32096, 33728, 36580, 37760, 40120, 42160, 58528, 62186, 64192, 67456, 73160, 80240, 84320, 117056, 124372, 128384, 146320, 155465, 160480, 168640, 234112, 248744, 292640, 310930, 320960, 337280, 497488, 585280, 621860, 641920, 994976, 1170560, 1243720, 1989952, 2487440, 3979904, 4974880, 9949760, 19899520]

約数ペア:

[(1, 19899520), (2, 9949760), (4, 4974880), (5, 3979904), (8, 2487440), (10, 1989952), (16, 1243720), (17, 1170560), (20, 994976), (31, 641920), (32, 621860), (34, 585280), (40, 497488), (59, 337280), (62, 320960), (64, 310930), (68, 292640), (80, 248744), (85, 234112), (118, 168640), (124, 160480), (128, 155465), (136, 146320), (155, 128384), (160, 124372), (170, 117056), (236, 84320), (248, 80240), (272, 73160), (295, 67456), (310, 64192), (320, 62186), (340, 58528), (472, 42160), (496, 40120), (527, 37760), (544, 36580), (590, 33728), (620, 32096), (640, 31093), (680, 29264), (944, 21080), (992, 20060), (1003, 19840), (1054, 18880), (1088, 18290), (1180, 16864), (1240, 16048), (1360, 14632), (1829, 10880), (1888, 10540), (1984, 10030), (2006, 9920), (2108, 9440), (2176, 9145), (2360, 8432), (2480, 8024), (2635, 7552), (2720, 7316), (3658, 5440), (3776, 5270), (3968, 5015), (4012, 4960), (4216, 4720)]