20454980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{11239}}^1$

素因数の和:11268

約数の個数: 48

約数和(自身を含む): 52872960

約数和(自身を除く): 32417980

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 182, 260, 364, 455, 910, 1820, 11239, 22478, 44956, 56195, 78673, 112390, 146107, 157346, 224780, 292214, 314692, 393365, 584428, 730535, 786730, 1022749, 1461070, 1573460, 2045498, 2922140, 4090996, 5113745, 10227490, 20454980]

約数ペア:

[(1, 20454980), (2, 10227490), (4, 5113745), (5, 4090996), (7, 2922140), (10, 2045498), (13, 1573460), (14, 1461070), (20, 1022749), (26, 786730), (28, 730535), (35, 584428), (52, 393365), (65, 314692), (70, 292214), (91, 224780), (130, 157346), (140, 146107), (182, 112390), (260, 78673), (364, 56195), (455, 44956), (910, 22478), (1820, 11239)]