28719860

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{29}}^1\times {\mathrm{293}}^1$

素因数の和:357

約数の個数: 72

約数和(自身を含む): 67790520

約数和(自身を除く): 39070660

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 29, 52, 58, 65, 116, 130, 145, 169, 260, 290, 293, 338, 377, 580, 586, 676, 754, 845, 1172, 1465, 1508, 1690, 1885, 2930, 3380, 3770, 3809, 4901, 5860, 7540, 7618, 8497, 9802, 15236, 16994, 19045, 19604, 24505, 33988, 38090, 42485, 49010, 49517, 76180, 84970, 98020, 99034, 110461, 169940, 198068, 220922, 247585, 441844, 495170, 552305, 990340, 1104610, 1435993, 2209220, 2871986, 5743972, 7179965, 14359930, 28719860]

約数ペア:

[(1, 28719860), (2, 14359930), (4, 7179965), (5, 5743972), (10, 2871986), (13, 2209220), (20, 1435993), (26, 1104610), (29, 990340), (52, 552305), (58, 495170), (65, 441844), (116, 247585), (130, 220922), (145, 198068), (169, 169940), (260, 110461), (290, 99034), (293, 98020), (338, 84970), (377, 76180), (580, 49517), (586, 49010), (676, 42485), (754, 38090), (845, 33988), (1172, 24505), (1465, 19604), (1508, 19045), (1690, 16994), (1885, 15236), (2930, 9802), (3380, 8497), (3770, 7618), (3809, 7540), (4901, 5860)]