20347640

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{1301}}^1$

素因数の和:1352

約数の個数: 64

約数和(自身を含む): 50621760

約数和(自身を除く): 30274120

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 23, 34, 40, 46, 68, 85, 92, 115, 136, 170, 184, 230, 340, 391, 460, 680, 782, 920, 1301, 1564, 1955, 2602, 3128, 3910, 5204, 6505, 7820, 10408, 13010, 15640, 22117, 26020, 29923, 44234, 52040, 59846, 88468, 110585, 119692, 149615, 176936, 221170, 239384, 299230, 442340, 508691, 598460, 884680, 1017382, 1196920, 2034764, 2543455, 4069528, 5086910, 10173820, 20347640]

約数ペア:

[(1, 20347640), (2, 10173820), (4, 5086910), (5, 4069528), (8, 2543455), (10, 2034764), (17, 1196920), (20, 1017382), (23, 884680), (34, 598460), (40, 508691), (46, 442340), (68, 299230), (85, 239384), (92, 221170), (115, 176936), (136, 149615), (170, 119692), (184, 110585), (230, 88468), (340, 59846), (391, 52040), (460, 44234), (680, 29923), (782, 26020), (920, 22117), (1301, 15640), (1564, 13010), (1955, 10408), (2602, 7820), (3128, 6505), (3910, 5204)]