642861808

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{127}}^1\times {\mathrm{16651}}^1$

素因数の和:16805

約数の個数: 40

約数和(自身を含む): 1321502720

約数和(自身を除く): 678640912

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 127, 152, 254, 304, 508, 1016, 2032, 2413, 4826, 9652, 16651, 19304, 33302, 38608, 66604, 133208, 266416, 316369, 632738, 1265476, 2114677, 2530952, 4229354, 5061904, 8458708, 16917416, 33834832, 40178863, 80357726, 160715452, 321430904, 642861808]

約数ペア:

[(1, 642861808), (2, 321430904), (4, 160715452), (8, 80357726), (16, 40178863), (19, 33834832), (38, 16917416), (76, 8458708), (127, 5061904), (152, 4229354), (254, 2530952), (304, 2114677), (508, 1265476), (1016, 632738), (2032, 316369), (2413, 266416), (4826, 133208), (9652, 66604), (16651, 38608), (19304, 33302)]