65117840

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{19853}}^1$

素因数の和:19907

約数の個数: 40

約数和(自身を含む): 155099448

約数和(自身を除く): 89981608

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 1640, 3280, 19853, 39706, 79412, 99265, 158824, 198530, 317648, 397060, 794120, 813973, 1588240, 1627946, 3255892, 4069865, 6511784, 8139730, 13023568, 16279460, 32558920, 65117840]

約数ペア:

[(1, 65117840), (2, 32558920), (4, 16279460), (5, 13023568), (8, 8139730), (10, 6511784), (16, 4069865), (20, 3255892), (40, 1627946), (41, 1588240), (80, 813973), (82, 794120), (164, 397060), (205, 317648), (328, 198530), (410, 158824), (656, 99265), (820, 79412), (1640, 39706), (3280, 19853)]