400217974

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{73}}^1\times {\mathrm{139}}^1$

素因数の和:305

約数の個数: 64

約数和(自身を含む): 694451520

約数和(自身を除く): 294233546

約数列:

[1, 2, 13, 26, 37, 41, 73, 74, 82, 139, 146, 278, 481, 533, 949, 962, 1066, 1517, 1807, 1898, 2701, 2993, 3034, 3614, 5143, 5402, 5699, 5986, 10147, 10286, 11398, 19721, 20294, 35113, 38909, 39442, 66859, 70226, 74087, 77818, 110741, 131911, 133718, 148174, 210863, 221482, 263822, 375439, 416027, 421726, 750878, 832054, 1439633, 2741219, 2879266, 4880707, 5408351, 5482438, 9761414, 10816702, 15392999, 30785998, 200108987, 400217974]

約数ペア:

[(1, 400217974), (2, 200108987), (13, 30785998), (26, 15392999), (37, 10816702), (41, 9761414), (73, 5482438), (74, 5408351), (82, 4880707), (139, 2879266), (146, 2741219), (278, 1439633), (481, 832054), (533, 750878), (949, 421726), (962, 416027), (1066, 375439), (1517, 263822), (1807, 221482), (1898, 210863), (2701, 148174), (2993, 133718), (3034, 131911), (3614, 110741), (5143, 77818), (5402, 74087), (5699, 70226), (5986, 66859), (10147, 39442), (10286, 38909), (11398, 35113), (19721, 20294)]