20384020

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{167}}^1\times {\mathrm{359}}^1$

素因数の和:552

約数の個数: 48

約数和(自身を含む): 45722880

約数和(自身を除く): 25338860

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 167, 170, 334, 340, 359, 668, 718, 835, 1436, 1670, 1795, 2839, 3340, 3590, 5678, 6103, 7180, 11356, 12206, 14195, 24412, 28390, 30515, 56780, 59953, 61030, 119906, 122060, 239812, 299765, 599530, 1019201, 1199060, 2038402, 4076804, 5096005, 10192010, 20384020]

約数ペア:

[(1, 20384020), (2, 10192010), (4, 5096005), (5, 4076804), (10, 2038402), (17, 1199060), (20, 1019201), (34, 599530), (68, 299765), (85, 239812), (167, 122060), (170, 119906), (334, 61030), (340, 59953), (359, 56780), (668, 30515), (718, 28390), (835, 24412), (1436, 14195), (1670, 12206), (1795, 11356), (2839, 7180), (3340, 6103), (3590, 5678)]