19969880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{977}}^1$

素因数の和:1068

約数の個数: 64

約数和(自身を含む): 52107840

約数和(自身を除く): 32137960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 73, 140, 146, 280, 292, 365, 511, 584, 730, 977, 1022, 1460, 1954, 2044, 2555, 2920, 3908, 4088, 4885, 5110, 6839, 7816, 9770, 10220, 13678, 19540, 20440, 27356, 34195, 39080, 54712, 68390, 71321, 136780, 142642, 273560, 285284, 356605, 499247, 570568, 713210, 998494, 1426420, 1996988, 2496235, 2852840, 3993976, 4992470, 9984940, 19969880]

約数ペア:

[(1, 19969880), (2, 9984940), (4, 4992470), (5, 3993976), (7, 2852840), (8, 2496235), (10, 1996988), (14, 1426420), (20, 998494), (28, 713210), (35, 570568), (40, 499247), (56, 356605), (70, 285284), (73, 273560), (140, 142642), (146, 136780), (280, 71321), (292, 68390), (365, 54712), (511, 39080), (584, 34195), (730, 27356), (977, 20440), (1022, 19540), (1460, 13678), (1954, 10220), (2044, 9770), (2555, 7816), (2920, 6839), (3908, 5110), (4088, 4885)]