20768800

素因数分解:

$2^5\times 5^2\times {\mathrm{13}}^1\times {\mathrm{1997}}^1$

素因数の和:2030

約数の個数: 72

約数和(自身を含む): 54629316

約数和(自身を除く): 33860516

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 32, 40, 50, 52, 65, 80, 100, 104, 130, 160, 200, 208, 260, 325, 400, 416, 520, 650, 800, 1040, 1300, 1997, 2080, 2600, 3994, 5200, 7988, 9985, 10400, 15976, 19970, 25961, 31952, 39940, 49925, 51922, 63904, 79880, 99850, 103844, 129805, 159760, 199700, 207688, 259610, 319520, 399400, 415376, 519220, 649025, 798800, 830752, 1038440, 1298050, 1597600, 2076880, 2596100, 4153760, 5192200, 10384400, 20768800]

約数ペア:

[(1, 20768800), (2, 10384400), (4, 5192200), (5, 4153760), (8, 2596100), (10, 2076880), (13, 1597600), (16, 1298050), (20, 1038440), (25, 830752), (26, 798800), (32, 649025), (40, 519220), (50, 415376), (52, 399400), (65, 319520), (80, 259610), (100, 207688), (104, 199700), (130, 159760), (160, 129805), (200, 103844), (208, 99850), (260, 79880), (325, 63904), (400, 51922), (416, 49925), (520, 39940), (650, 31952), (800, 25961), (1040, 19970), (1300, 15976), (1997, 10400), (2080, 9985), (2600, 7988), (3994, 5200)]