28068820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{1213}}^1$

素因数の和:1324

約数の個数: 48

約数和(自身を含む): 64244880

約数和(自身を除く): 36176060

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 89, 130, 178, 260, 356, 445, 890, 1157, 1213, 1780, 2314, 2426, 4628, 4852, 5785, 6065, 11570, 12130, 15769, 23140, 24260, 31538, 63076, 78845, 107957, 157690, 215914, 315380, 431828, 539785, 1079570, 1403441, 2159140, 2806882, 5613764, 7017205, 14034410, 28068820]

約数ペア:

[(1, 28068820), (2, 14034410), (4, 7017205), (5, 5613764), (10, 2806882), (13, 2159140), (20, 1403441), (26, 1079570), (52, 539785), (65, 431828), (89, 315380), (130, 215914), (178, 157690), (260, 107957), (356, 78845), (445, 63076), (890, 31538), (1157, 24260), (1213, 23140), (1780, 15769), (2314, 12130), (2426, 11570), (4628, 6065), (4852, 5785)]