21153480

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{409}}^1\times {\mathrm{431}}^1$

素因数の和:854

約数の個数: 64

約数和(自身を含む): 63763200

約数和(自身を除く): 42609720

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 409, 431, 818, 862, 1227, 1293, 1636, 1724, 2045, 2155, 2454, 2586, 3272, 3448, 4090, 4310, 4908, 5172, 6135, 6465, 8180, 8620, 9816, 10344, 12270, 12930, 16360, 17240, 24540, 25860, 49080, 51720, 176279, 352558, 528837, 705116, 881395, 1057674, 1410232, 1762790, 2115348, 2644185, 3525580, 4230696, 5288370, 7051160, 10576740, 21153480]

約数ペア:

[(1, 21153480), (2, 10576740), (3, 7051160), (4, 5288370), (5, 4230696), (6, 3525580), (8, 2644185), (10, 2115348), (12, 1762790), (15, 1410232), (20, 1057674), (24, 881395), (30, 705116), (40, 528837), (60, 352558), (120, 176279), (409, 51720), (431, 49080), (818, 25860), (862, 24540), (1227, 17240), (1293, 16360), (1636, 12930), (1724, 12270), (2045, 10344), (2155, 9816), (2454, 8620), (2586, 8180), (3272, 6465), (3448, 6135), (4090, 5172), (4310, 4908)]