21953025

素因数分解:

$3^4\times 5^2\times {\mathrm{37}}^1\times {\mathrm{293}}^1$

素因数の和:352

約数の個数: 60

約数和(自身を含む): 41906172

約数和(自身を除く): 19953147

約数列:

[1, 3, 5, 9, 15, 25, 27, 37, 45, 75, 81, 111, 135, 185, 225, 293, 333, 405, 555, 675, 879, 925, 999, 1465, 1665, 2025, 2637, 2775, 2997, 4395, 4995, 7325, 7911, 8325, 10841, 13185, 14985, 21975, 23733, 24975, 32523, 39555, 54205, 65925, 74925, 97569, 118665, 162615, 197775, 271025, 292707, 487845, 593325, 813075, 878121, 1463535, 2439225, 4390605, 7317675, 21953025]

約数ペア:

[(1, 21953025), (3, 7317675), (5, 4390605), (9, 2439225), (15, 1463535), (25, 878121), (27, 813075), (37, 593325), (45, 487845), (75, 292707), (81, 271025), (111, 197775), (135, 162615), (185, 118665), (225, 97569), (293, 74925), (333, 65925), (405, 54205), (555, 39555), (675, 32523), (879, 24975), (925, 23733), (999, 21975), (1465, 14985), (1665, 13185), (2025, 10841), (2637, 8325), (2775, 7911), (2997, 7325), (4395, 4995)]