397407680

素因数分解:

$2^6\times 5^1\times {\mathrm{61}}^1\times {\mathrm{20359}}^1$

素因数の和:20437

約数の個数: 56

約数和(自身を含む): 961887840

約数和(自身を除く): 564480160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 61, 64, 80, 122, 160, 244, 305, 320, 488, 610, 976, 1220, 1952, 2440, 3904, 4880, 9760, 19520, 20359, 40718, 81436, 101795, 162872, 203590, 325744, 407180, 651488, 814360, 1241899, 1302976, 1628720, 2483798, 3257440, 4967596, 6209495, 6514880, 9935192, 12418990, 19870384, 24837980, 39740768, 49675960, 79481536, 99351920, 198703840, 397407680]

約数ペア:

[(1, 397407680), (2, 198703840), (4, 99351920), (5, 79481536), (8, 49675960), (10, 39740768), (16, 24837980), (20, 19870384), (32, 12418990), (40, 9935192), (61, 6514880), (64, 6209495), (80, 4967596), (122, 3257440), (160, 2483798), (244, 1628720), (305, 1302976), (320, 1241899), (488, 814360), (610, 651488), (976, 407180), (1220, 325744), (1952, 203590), (2440, 162872), (3904, 101795), (4880, 81436), (9760, 40718), (19520, 20359)]