256365005

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{83}}^1$

素因数の和:222

約数の個数: 64

約数和(自身を含む): 367476480

約数和(自身を除く): 111111475

約数列:

[1, 5, 13, 19, 41, 61, 65, 83, 95, 205, 247, 305, 415, 533, 779, 793, 1079, 1159, 1235, 1577, 2501, 2665, 3403, 3895, 3965, 5063, 5395, 5795, 7885, 10127, 12505, 15067, 17015, 20501, 25315, 32513, 44239, 47519, 50635, 64657, 65819, 75335, 96197, 102505, 162565, 207583, 221195, 237595, 323285, 329095, 480985, 617747, 840541, 1037915, 1250561, 2698579, 3088735, 3944077, 4202705, 6252805, 13492895, 19720385, 51273001, 256365005]

約数ペア:

[(1, 256365005), (5, 51273001), (13, 19720385), (19, 13492895), (41, 6252805), (61, 4202705), (65, 3944077), (83, 3088735), (95, 2698579), (205, 1250561), (247, 1037915), (305, 840541), (415, 617747), (533, 480985), (779, 329095), (793, 323285), (1079, 237595), (1159, 221195), (1235, 207583), (1577, 162565), (2501, 102505), (2665, 96197), (3403, 75335), (3895, 65819), (3965, 64657), (5063, 50635), (5395, 47519), (5795, 44239), (7885, 32513), (10127, 25315), (12505, 20501), (15067, 17015)]