19998225

素因数分解:

$3^3\times 5^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1$

素因数の和:128

約数の個数: 96

約数和(自身を含む): 41247360

約数和(自身を除く): 21249135

約数列:

[1, 3, 5, 9, 13, 15, 25, 27, 39, 43, 45, 53, 65, 75, 117, 129, 135, 159, 195, 215, 225, 265, 325, 351, 387, 477, 559, 585, 645, 675, 689, 795, 975, 1075, 1161, 1325, 1431, 1677, 1755, 1935, 2067, 2279, 2385, 2795, 2925, 3225, 3445, 3975, 5031, 5805, 6201, 6837, 7155, 8385, 8775, 9675, 10335, 11395, 11925, 13975, 15093, 17225, 18603, 20511, 25155, 29025, 29627, 31005, 34185, 35775, 41925, 51675, 56975, 61533, 75465, 88881, 93015, 102555, 125775, 148135, 155025, 170925, 266643, 307665, 377325, 444405, 465075, 512775, 740675, 799929, 1333215, 1538325, 2222025, 3999645, 6666075, 19998225]

約数ペア:

[(1, 19998225), (3, 6666075), (5, 3999645), (9, 2222025), (13, 1538325), (15, 1333215), (25, 799929), (27, 740675), (39, 512775), (43, 465075), (45, 444405), (53, 377325), (65, 307665), (75, 266643), (117, 170925), (129, 155025), (135, 148135), (159, 125775), (195, 102555), (215, 93015), (225, 88881), (265, 75465), (325, 61533), (351, 56975), (387, 51675), (477, 41925), (559, 35775), (585, 34185), (645, 31005), (675, 29627), (689, 29025), (795, 25155), (975, 20511), (1075, 18603), (1161, 17225), (1325, 15093), (1431, 13975), (1677, 11925), (1755, 11395), (1935, 10335), (2067, 9675), (2279, 8775), (2385, 8385), (2795, 7155), (2925, 6837), (3225, 6201), (3445, 5805), (3975, 5031)]