21444240

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{199}}^1\times {\mathrm{449}}^1$

素因数の和:664

約数の個数: 80

約数和(自身を含む): 66960000

約数和(自身を除く): 45515760

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 199, 240, 398, 449, 597, 796, 898, 995, 1194, 1347, 1592, 1796, 1990, 2245, 2388, 2694, 2985, 3184, 3592, 3980, 4490, 4776, 5388, 5970, 6735, 7184, 7960, 8980, 9552, 10776, 11940, 13470, 15920, 17960, 21552, 23880, 26940, 35920, 47760, 53880, 89351, 107760, 178702, 268053, 357404, 446755, 536106, 714808, 893510, 1072212, 1340265, 1429616, 1787020, 2144424, 2680530, 3574040, 4288848, 5361060, 7148080, 10722120, 21444240]

約数ペア:

[(1, 21444240), (2, 10722120), (3, 7148080), (4, 5361060), (5, 4288848), (6, 3574040), (8, 2680530), (10, 2144424), (12, 1787020), (15, 1429616), (16, 1340265), (20, 1072212), (24, 893510), (30, 714808), (40, 536106), (48, 446755), (60, 357404), (80, 268053), (120, 178702), (199, 107760), (240, 89351), (398, 53880), (449, 47760), (597, 35920), (796, 26940), (898, 23880), (995, 21552), (1194, 17960), (1347, 15920), (1592, 13470), (1796, 11940), (1990, 10776), (2245, 9552), (2388, 8980), (2694, 7960), (2985, 7184), (3184, 6735), (3592, 5970), (3980, 5388), (4490, 4776)]