20318740

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{4597}}^1$

素因数の和:4636

約数の個数: 48

約数和(自身を含む): 48665232

約数和(自身を除く): 28346492

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 26, 34, 52, 65, 68, 85, 130, 170, 221, 260, 340, 442, 884, 1105, 2210, 4420, 4597, 9194, 18388, 22985, 45970, 59761, 78149, 91940, 119522, 156298, 239044, 298805, 312596, 390745, 597610, 781490, 1015937, 1195220, 1562980, 2031874, 4063748, 5079685, 10159370, 20318740]

約数ペア:

[(1, 20318740), (2, 10159370), (4, 5079685), (5, 4063748), (10, 2031874), (13, 1562980), (17, 1195220), (20, 1015937), (26, 781490), (34, 597610), (52, 390745), (65, 312596), (68, 298805), (85, 239044), (130, 156298), (170, 119522), (221, 91940), (260, 78149), (340, 59761), (442, 45970), (884, 22985), (1105, 18388), (2210, 9194), (4420, 4597)]