21495225

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{733}}^1$

素因数の和:786

約数の個数: 48

約数和(自身を含む): 39318912

約数和(自身を除く): 17823687

約数列:

[1, 3, 5, 15, 17, 23, 25, 51, 69, 75, 85, 115, 255, 345, 391, 425, 575, 733, 1173, 1275, 1725, 1955, 2199, 3665, 5865, 9775, 10995, 12461, 16859, 18325, 29325, 37383, 50577, 54975, 62305, 84295, 186915, 252885, 286603, 311525, 421475, 859809, 934575, 1264425, 1433015, 4299045, 7165075, 21495225]

約数ペア:

[(1, 21495225), (3, 7165075), (5, 4299045), (15, 1433015), (17, 1264425), (23, 934575), (25, 859809), (51, 421475), (69, 311525), (75, 286603), (85, 252885), (115, 186915), (255, 84295), (345, 62305), (391, 54975), (425, 50577), (575, 37383), (733, 29325), (1173, 18325), (1275, 16859), (1725, 12461), (1955, 10995), (2199, 9775), (3665, 5865)]