19888120

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{73}}^1\times {\mathrm{139}}^1$

素因数の和:237

約数の個数: 96

約数和(自身を含む): 53146800

約数和(自身を除く): 33258680

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 73, 98, 139, 140, 146, 196, 245, 278, 280, 292, 365, 392, 490, 511, 556, 584, 695, 730, 973, 980, 1022, 1112, 1390, 1460, 1946, 1960, 2044, 2555, 2780, 2920, 3577, 3892, 4088, 4865, 5110, 5560, 6811, 7154, 7784, 9730, 10147, 10220, 13622, 14308, 17885, 19460, 20294, 20440, 27244, 28616, 34055, 35770, 38920, 40588, 50735, 54488, 68110, 71029, 71540, 81176, 101470, 136220, 142058, 143080, 202940, 272440, 284116, 355145, 405880, 497203, 568232, 710290, 994406, 1420580, 1988812, 2486015, 2841160, 3977624, 4972030, 9944060, 19888120]

約数ペア:

[(1, 19888120), (2, 9944060), (4, 4972030), (5, 3977624), (7, 2841160), (8, 2486015), (10, 1988812), (14, 1420580), (20, 994406), (28, 710290), (35, 568232), (40, 497203), (49, 405880), (56, 355145), (70, 284116), (73, 272440), (98, 202940), (139, 143080), (140, 142058), (146, 136220), (196, 101470), (245, 81176), (278, 71540), (280, 71029), (292, 68110), (365, 54488), (392, 50735), (490, 40588), (511, 38920), (556, 35770), (584, 34055), (695, 28616), (730, 27244), (973, 20440), (980, 20294), (1022, 19460), (1112, 17885), (1390, 14308), (1460, 13622), (1946, 10220), (1960, 10147), (2044, 9730), (2555, 7784), (2780, 7154), (2920, 6811), (3577, 5560), (3892, 5110), (4088, 4865)]