18936340

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{97}}^1\times {\mathrm{227}}^1$

素因数の和:376

約数の個数: 48

約数和(自身を含む): 41291712

約数和(自身を除く): 22355372

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 97, 172, 194, 215, 227, 388, 430, 454, 485, 860, 908, 970, 1135, 1940, 2270, 4171, 4540, 8342, 9761, 16684, 19522, 20855, 22019, 39044, 41710, 44038, 48805, 83420, 88076, 97610, 110095, 195220, 220190, 440380, 946817, 1893634, 3787268, 4734085, 9468170, 18936340]

約数ペア:

[(1, 18936340), (2, 9468170), (4, 4734085), (5, 3787268), (10, 1893634), (20, 946817), (43, 440380), (86, 220190), (97, 195220), (172, 110095), (194, 97610), (215, 88076), (227, 83420), (388, 48805), (430, 44038), (454, 41710), (485, 39044), (860, 22019), (908, 20855), (970, 19522), (1135, 16684), (1940, 9761), (2270, 8342), (4171, 4540)]