20198516

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{313}}^1$

素因数の和:420

約数の個数: 48

約数和(自身を含む): 40988304

約数和(自身を除く): 20789788

約数列:

[1, 2, 4, 13, 17, 26, 34, 52, 68, 73, 146, 221, 292, 313, 442, 626, 884, 949, 1241, 1252, 1898, 2482, 3796, 4069, 4964, 5321, 8138, 10642, 16133, 16276, 21284, 22849, 32266, 45698, 64532, 69173, 91396, 138346, 276692, 297037, 388433, 594074, 776866, 1188148, 1553732, 5049629, 10099258, 20198516]

約数ペア:

[(1, 20198516), (2, 10099258), (4, 5049629), (13, 1553732), (17, 1188148), (26, 776866), (34, 594074), (52, 388433), (68, 297037), (73, 276692), (146, 138346), (221, 91396), (292, 69173), (313, 64532), (442, 45698), (626, 32266), (884, 22849), (949, 21284), (1241, 16276), (1252, 16133), (1898, 10642), (2482, 8138), (3796, 5321), (4069, 4964)]