20120971720

素因数分解:

$2^3\times 5^1\times {\mathrm{103}}^1\times {\mathrm{283}}^1\times {\mathrm{17257}}^1$

素因数の和:17654

約数の個数: 64

約数和(自身を含む): 45875905920

約数和(自身を除く): 25754934200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 103, 206, 283, 412, 515, 566, 824, 1030, 1132, 1415, 2060, 2264, 2830, 4120, 5660, 11320, 17257, 29149, 34514, 58298, 69028, 86285, 116596, 138056, 145745, 172570, 233192, 291490, 345140, 582980, 690280, 1165960, 1777471, 3554942, 4883731, 7109884, 8887355, 9767462, 14219768, 17774710, 19534924, 24418655, 35549420, 39069848, 48837310, 71098840, 97674620, 195349240, 503024293, 1006048586, 2012097172, 2515121465, 4024194344, 5030242930, 10060485860, 20120971720]

約数ペア:

[(1, 20120971720), (2, 10060485860), (4, 5030242930), (5, 4024194344), (8, 2515121465), (10, 2012097172), (20, 1006048586), (40, 503024293), (103, 195349240), (206, 97674620), (283, 71098840), (412, 48837310), (515, 39069848), (566, 35549420), (824, 24418655), (1030, 19534924), (1132, 17774710), (1415, 14219768), (2060, 9767462), (2264, 8887355), (2830, 7109884), (4120, 4883731), (5660, 3554942), (11320, 1777471), (17257, 1165960), (29149, 690280), (34514, 582980), (58298, 345140), (69028, 291490), (86285, 233192), (116596, 172570), (138056, 145745)]