28957760

素因数分解:

$2^6\times 5^1\times {\mathrm{13}}^1\times {\mathrm{6961}}^1$

素因数の和:6991

約数の個数: 56

約数和(自身を含む): 74270616

約数和(自身を除く): 45312856

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 130, 160, 208, 260, 320, 416, 520, 832, 1040, 2080, 4160, 6961, 13922, 27844, 34805, 55688, 69610, 90493, 111376, 139220, 180986, 222752, 278440, 361972, 445504, 452465, 556880, 723944, 904930, 1113760, 1447888, 1809860, 2227520, 2895776, 3619720, 5791552, 7239440, 14478880, 28957760]

約数ペア:

[(1, 28957760), (2, 14478880), (4, 7239440), (5, 5791552), (8, 3619720), (10, 2895776), (13, 2227520), (16, 1809860), (20, 1447888), (26, 1113760), (32, 904930), (40, 723944), (52, 556880), (64, 452465), (65, 445504), (80, 361972), (104, 278440), (130, 222752), (160, 180986), (208, 139220), (260, 111376), (320, 90493), (416, 69610), (520, 55688), (832, 34805), (1040, 27844), (2080, 13922), (4160, 6961)]