19550500

素因数分解:

$2^2\times 5^3\times {\mathrm{61}}^1\times {\mathrm{641}}^1$

素因数の和:721

約数の個数: 48

約数和(自身を含む): 43465968

約数和(自身を除く): 23915468

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 61, 100, 122, 125, 244, 250, 305, 500, 610, 641, 1220, 1282, 1525, 2564, 3050, 3205, 6100, 6410, 7625, 12820, 15250, 16025, 30500, 32050, 39101, 64100, 78202, 80125, 156404, 160250, 195505, 320500, 391010, 782020, 977525, 1955050, 3910100, 4887625, 9775250, 19550500]

約数ペア:

[(1, 19550500), (2, 9775250), (4, 4887625), (5, 3910100), (10, 1955050), (20, 977525), (25, 782020), (50, 391010), (61, 320500), (100, 195505), (122, 160250), (125, 156404), (244, 80125), (250, 78202), (305, 64100), (500, 39101), (610, 32050), (641, 30500), (1220, 16025), (1282, 15250), (1525, 12820), (2564, 7625), (3050, 6410), (3205, 6100)]