30721275

素因数分解:

$3^5\times 5^2\times {\mathrm{13}}^1\times {\mathrm{389}}^1$

素因数の和:427

約数の個数: 72

約数和(自身を含む): 61610640

約数和(自身を除く): 30889365

約数列:

[1, 3, 5, 9, 13, 15, 25, 27, 39, 45, 65, 75, 81, 117, 135, 195, 225, 243, 325, 351, 389, 405, 585, 675, 975, 1053, 1167, 1215, 1755, 1945, 2025, 2925, 3159, 3501, 5057, 5265, 5835, 6075, 8775, 9725, 10503, 15171, 15795, 17505, 25285, 26325, 29175, 31509, 45513, 52515, 75855, 78975, 87525, 94527, 126425, 136539, 157545, 227565, 262575, 379275, 409617, 472635, 682695, 787725, 1137825, 1228851, 2048085, 2363175, 3413475, 6144255, 10240425, 30721275]

約数ペア:

[(1, 30721275), (3, 10240425), (5, 6144255), (9, 3413475), (13, 2363175), (15, 2048085), (25, 1228851), (27, 1137825), (39, 787725), (45, 682695), (65, 472635), (75, 409617), (81, 379275), (117, 262575), (135, 227565), (195, 157545), (225, 136539), (243, 126425), (325, 94527), (351, 87525), (389, 78975), (405, 75855), (585, 52515), (675, 45513), (975, 31509), (1053, 29175), (1167, 26325), (1215, 25285), (1755, 17505), (1945, 15795), (2025, 15171), (2925, 10503), (3159, 9725), (3501, 8775), (5057, 6075), (5265, 5835)]