21041228

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{73}}^1\times {\mathrm{241}}^1$

素因数の和:354

約数の個数: 48

約数和(自身を含む): 42119616

約数和(自身を除く): 21078388

約数列:

[1, 2, 4, 13, 23, 26, 46, 52, 73, 92, 146, 241, 292, 299, 482, 598, 949, 964, 1196, 1679, 1898, 3133, 3358, 3796, 5543, 6266, 6716, 11086, 12532, 17593, 21827, 22172, 35186, 43654, 70372, 72059, 87308, 144118, 228709, 288236, 404639, 457418, 809278, 914836, 1618556, 5260307, 10520614, 21041228]

約数ペア:

[(1, 21041228), (2, 10520614), (4, 5260307), (13, 1618556), (23, 914836), (26, 809278), (46, 457418), (52, 404639), (73, 288236), (92, 228709), (146, 144118), (241, 87308), (292, 72059), (299, 70372), (482, 43654), (598, 35186), (949, 22172), (964, 21827), (1196, 17593), (1679, 12532), (1898, 11086), (3133, 6716), (3358, 6266), (3796, 5543)]