20396500

素因数分解:

$2^2\times 5^3\times {\mathrm{19}}^2\times {\mathrm{113}}^1$

素因数の和:170

約数の個数: 72

約数和(自身を含む): 47429928

約数和(自身を除く): 27033428

約数列:

[1, 2, 4, 5, 10, 19, 20, 25, 38, 50, 76, 95, 100, 113, 125, 190, 226, 250, 361, 380, 452, 475, 500, 565, 722, 950, 1130, 1444, 1805, 1900, 2147, 2260, 2375, 2825, 3610, 4294, 4750, 5650, 7220, 8588, 9025, 9500, 10735, 11300, 14125, 18050, 21470, 28250, 36100, 40793, 42940, 45125, 53675, 56500, 81586, 90250, 107350, 163172, 180500, 203965, 214700, 268375, 407930, 536750, 815860, 1019825, 1073500, 2039650, 4079300, 5099125, 10198250, 20396500]

約数ペア:

[(1, 20396500), (2, 10198250), (4, 5099125), (5, 4079300), (10, 2039650), (19, 1073500), (20, 1019825), (25, 815860), (38, 536750), (50, 407930), (76, 268375), (95, 214700), (100, 203965), (113, 180500), (125, 163172), (190, 107350), (226, 90250), (250, 81586), (361, 56500), (380, 53675), (452, 45125), (475, 42940), (500, 40793), (565, 36100), (722, 28250), (950, 21470), (1130, 18050), (1444, 14125), (1805, 11300), (1900, 10735), (2147, 9500), (2260, 9025), (2375, 8588), (2825, 7220), (3610, 5650), (4294, 4750)]