20735120

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{607}}^1$

素因数の和:688

約数の個数: 80

約数和(自身を含む): 56091648

約数和(自身を除く): 35356528

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 61, 70, 80, 112, 122, 140, 244, 280, 305, 427, 488, 560, 607, 610, 854, 976, 1214, 1220, 1708, 2135, 2428, 2440, 3035, 3416, 4249, 4270, 4856, 4880, 6070, 6832, 8498, 8540, 9712, 12140, 16996, 17080, 21245, 24280, 33992, 34160, 37027, 42490, 48560, 67984, 74054, 84980, 148108, 169960, 185135, 259189, 296216, 339920, 370270, 518378, 592432, 740540, 1036756, 1295945, 1481080, 2073512, 2591890, 2962160, 4147024, 5183780, 10367560, 20735120]

約数ペア:

[(1, 20735120), (2, 10367560), (4, 5183780), (5, 4147024), (7, 2962160), (8, 2591890), (10, 2073512), (14, 1481080), (16, 1295945), (20, 1036756), (28, 740540), (35, 592432), (40, 518378), (56, 370270), (61, 339920), (70, 296216), (80, 259189), (112, 185135), (122, 169960), (140, 148108), (244, 84980), (280, 74054), (305, 67984), (427, 48560), (488, 42490), (560, 37027), (607, 34160), (610, 33992), (854, 24280), (976, 21245), (1214, 17080), (1220, 16996), (1708, 12140), (2135, 9712), (2428, 8540), (2440, 8498), (3035, 6832), (3416, 6070), (4249, 4880), (4270, 4856)]