17749720

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{79}}^1\times {\mathrm{137}}^1$

素因数の和:268

約数の個数: 64

約数和(自身を含む): 41731200

約数和(自身を除く): 23981480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 79, 82, 137, 158, 164, 205, 274, 316, 328, 395, 410, 548, 632, 685, 790, 820, 1096, 1370, 1580, 1640, 2740, 3160, 3239, 5480, 5617, 6478, 10823, 11234, 12956, 16195, 21646, 22468, 25912, 28085, 32390, 43292, 44936, 54115, 56170, 64780, 86584, 108230, 112340, 129560, 216460, 224680, 432920, 443743, 887486, 1774972, 2218715, 3549944, 4437430, 8874860, 17749720]

約数ペア:

[(1, 17749720), (2, 8874860), (4, 4437430), (5, 3549944), (8, 2218715), (10, 1774972), (20, 887486), (40, 443743), (41, 432920), (79, 224680), (82, 216460), (137, 129560), (158, 112340), (164, 108230), (205, 86584), (274, 64780), (316, 56170), (328, 54115), (395, 44936), (410, 43292), (548, 32390), (632, 28085), (685, 25912), (790, 22468), (820, 21646), (1096, 16195), (1370, 12956), (1580, 11234), (1640, 10823), (2740, 6478), (3160, 5617), (3239, 5480)]