20053540

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{349}}^1$

素因数の和:401

約数の個数: 72

約数和(自身を含む): 48421800

約数和(自身を除く): 28368260

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 26, 34, 52, 65, 68, 85, 130, 169, 170, 221, 260, 338, 340, 349, 442, 676, 698, 845, 884, 1105, 1396, 1690, 1745, 2210, 2873, 3380, 3490, 4420, 4537, 5746, 5933, 6980, 9074, 11492, 11866, 14365, 18148, 22685, 23732, 28730, 29665, 45370, 57460, 58981, 59330, 77129, 90740, 117962, 118660, 154258, 235924, 294905, 308516, 385645, 589810, 771290, 1002677, 1179620, 1542580, 2005354, 4010708, 5013385, 10026770, 20053540]

約数ペア:

[(1, 20053540), (2, 10026770), (4, 5013385), (5, 4010708), (10, 2005354), (13, 1542580), (17, 1179620), (20, 1002677), (26, 771290), (34, 589810), (52, 385645), (65, 308516), (68, 294905), (85, 235924), (130, 154258), (169, 118660), (170, 117962), (221, 90740), (260, 77129), (338, 59330), (340, 58981), (349, 57460), (442, 45370), (676, 29665), (698, 28730), (845, 23732), (884, 22685), (1105, 18148), (1396, 14365), (1690, 11866), (1745, 11492), (2210, 9074), (2873, 6980), (3380, 5933), (3490, 5746), (4420, 4537)]