16721140

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{557}}^1$

素因数の和:664

約数の個数: 48

約数和(自身を含む): 37497600

約数和(自身を除く): 20776460

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 79, 95, 158, 190, 316, 380, 395, 557, 790, 1114, 1501, 1580, 2228, 2785, 3002, 5570, 6004, 7505, 10583, 11140, 15010, 21166, 30020, 42332, 44003, 52915, 88006, 105830, 176012, 211660, 220015, 440030, 836057, 880060, 1672114, 3344228, 4180285, 8360570, 16721140]

約数ペア:

[(1, 16721140), (2, 8360570), (4, 4180285), (5, 3344228), (10, 1672114), (19, 880060), (20, 836057), (38, 440030), (76, 220015), (79, 211660), (95, 176012), (158, 105830), (190, 88006), (316, 52915), (380, 44003), (395, 42332), (557, 30020), (790, 21166), (1114, 15010), (1501, 11140), (1580, 10583), (2228, 7505), (2785, 6004), (3002, 5570)]