17984980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{313}}^1$

素因数の和:365

約数の個数: 72

約数和(自身を含む): 43441272

約数和(自身を除く): 25456292

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 26, 34, 52, 65, 68, 85, 130, 169, 170, 221, 260, 313, 338, 340, 442, 626, 676, 845, 884, 1105, 1252, 1565, 1690, 2210, 2873, 3130, 3380, 4069, 4420, 5321, 5746, 6260, 8138, 10642, 11492, 14365, 16276, 20345, 21284, 26605, 28730, 40690, 52897, 53210, 57460, 69173, 81380, 105794, 106420, 138346, 211588, 264485, 276692, 345865, 528970, 691730, 899249, 1057940, 1383460, 1798498, 3596996, 4496245, 8992490, 17984980]

約数ペア:

[(1, 17984980), (2, 8992490), (4, 4496245), (5, 3596996), (10, 1798498), (13, 1383460), (17, 1057940), (20, 899249), (26, 691730), (34, 528970), (52, 345865), (65, 276692), (68, 264485), (85, 211588), (130, 138346), (169, 106420), (170, 105794), (221, 81380), (260, 69173), (313, 57460), (338, 53210), (340, 52897), (442, 40690), (626, 28730), (676, 26605), (845, 21284), (884, 20345), (1105, 16276), (1252, 14365), (1565, 11492), (1690, 10642), (2210, 8138), (2873, 6260), (3130, 5746), (3380, 5321), (4069, 4420)]