19353940

素因数分解:

$2^2\times 5^1\times {\mathrm{83}}^1\times {\mathrm{89}}^1\times {\mathrm{131}}^1$

素因数の和:312

約数の個数: 48

約数和(自身を含む): 41912640

約数和(自身を除く): 22558700

約数列:

[1, 2, 4, 5, 10, 20, 83, 89, 131, 166, 178, 262, 332, 356, 415, 445, 524, 655, 830, 890, 1310, 1660, 1780, 2620, 7387, 10873, 11659, 14774, 21746, 23318, 29548, 36935, 43492, 46636, 54365, 58295, 73870, 108730, 116590, 147740, 217460, 233180, 967697, 1935394, 3870788, 4838485, 9676970, 19353940]

約数ペア:

[(1, 19353940), (2, 9676970), (4, 4838485), (5, 3870788), (10, 1935394), (20, 967697), (83, 233180), (89, 217460), (131, 147740), (166, 116590), (178, 108730), (262, 73870), (332, 58295), (356, 54365), (415, 46636), (445, 43492), (524, 36935), (655, 29548), (830, 23318), (890, 21746), (1310, 14774), (1660, 11659), (1780, 10873), (2620, 7387)]