19880480

素因数分解:

$2^5\times 5^1\times {\mathrm{17}}^1\times {\mathrm{7309}}^1$

素因数の和:7341

約数の個数: 48

約数和(自身を含む): 49737240

約数和(自身を除く): 29856760

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 68, 80, 85, 136, 160, 170, 272, 340, 544, 680, 1360, 2720, 7309, 14618, 29236, 36545, 58472, 73090, 116944, 124253, 146180, 233888, 248506, 292360, 497012, 584720, 621265, 994024, 1169440, 1242530, 1988048, 2485060, 3976096, 4970120, 9940240, 19880480]

約数ペア:

[(1, 19880480), (2, 9940240), (4, 4970120), (5, 3976096), (8, 2485060), (10, 1988048), (16, 1242530), (17, 1169440), (20, 994024), (32, 621265), (34, 584720), (40, 497012), (68, 292360), (80, 248506), (85, 233888), (136, 146180), (160, 124253), (170, 116944), (272, 73090), (340, 58472), (544, 36545), (680, 29236), (1360, 14618), (2720, 7309)]