1618881008

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{157}}^1\times {\mathrm{20789}}^1$

素因数の和:20985

約数の個数: 40

約数和(自身を含む): 3258541440

約数和(自身を除く): 1639660432

約数列:

[1, 2, 4, 8, 16, 31, 62, 124, 157, 248, 314, 496, 628, 1256, 2512, 4867, 9734, 19468, 20789, 38936, 41578, 77872, 83156, 166312, 332624, 644459, 1288918, 2577836, 3263873, 5155672, 6527746, 10311344, 13055492, 26110984, 52221968, 101180063, 202360126, 404720252, 809440504, 1618881008]

約数ペア:

[(1, 1618881008), (2, 809440504), (4, 404720252), (8, 202360126), (16, 101180063), (31, 52221968), (62, 26110984), (124, 13055492), (157, 10311344), (248, 6527746), (314, 5155672), (496, 3263873), (628, 2577836), (1256, 1288918), (2512, 644459), (4867, 332624), (9734, 166312), (19468, 83156), (20789, 77872), (38936, 41578)]