42640520

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{1907}}^1$

素因数の和:1974

約数の個数: 64

約数和(自身を含む): 105779520

約数和(自身を除く): 63139000

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 43, 52, 65, 86, 104, 130, 172, 215, 260, 344, 430, 520, 559, 860, 1118, 1720, 1907, 2236, 2795, 3814, 4472, 5590, 7628, 9535, 11180, 15256, 19070, 22360, 24791, 38140, 49582, 76280, 82001, 99164, 123955, 164002, 198328, 247910, 328004, 410005, 495820, 656008, 820010, 991640, 1066013, 1640020, 2132026, 3280040, 4264052, 5330065, 8528104, 10660130, 21320260, 42640520]

約数ペア:

[(1, 42640520), (2, 21320260), (4, 10660130), (5, 8528104), (8, 5330065), (10, 4264052), (13, 3280040), (20, 2132026), (26, 1640020), (40, 1066013), (43, 991640), (52, 820010), (65, 656008), (86, 495820), (104, 410005), (130, 328004), (172, 247910), (215, 198328), (260, 164002), (344, 123955), (430, 99164), (520, 82001), (559, 76280), (860, 49582), (1118, 38140), (1720, 24791), (1907, 22360), (2236, 19070), (2795, 15256), (3814, 11180), (4472, 9535), (5590, 7628)]