21808688

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{197}}^1$

素因数の和:270

約数の個数: 80

約数和(自身を含む): 50380704

約数和(自身を除く): 28572016

約数列:

[1, 2, 4, 8, 11, 16, 17, 22, 34, 37, 44, 68, 74, 88, 136, 148, 176, 187, 197, 272, 296, 374, 394, 407, 592, 629, 748, 788, 814, 1258, 1496, 1576, 1628, 2167, 2516, 2992, 3152, 3256, 3349, 4334, 5032, 6512, 6698, 6919, 7289, 8668, 10064, 13396, 13838, 14578, 17336, 26792, 27676, 29156, 34672, 36839, 53584, 55352, 58312, 73678, 80179, 110704, 116624, 123913, 147356, 160358, 247826, 294712, 320716, 495652, 589424, 641432, 991304, 1282864, 1363043, 1982608, 2726086, 5452172, 10904344, 21808688]

約数ペア:

[(1, 21808688), (2, 10904344), (4, 5452172), (8, 2726086), (11, 1982608), (16, 1363043), (17, 1282864), (22, 991304), (34, 641432), (37, 589424), (44, 495652), (68, 320716), (74, 294712), (88, 247826), (136, 160358), (148, 147356), (176, 123913), (187, 116624), (197, 110704), (272, 80179), (296, 73678), (374, 58312), (394, 55352), (407, 53584), (592, 36839), (629, 34672), (748, 29156), (788, 27676), (814, 26792), (1258, 17336), (1496, 14578), (1576, 13838), (1628, 13396), (2167, 10064), (2516, 8668), (2992, 7289), (3152, 6919), (3256, 6698), (3349, 6512), (4334, 5032)]