20308275

素因数分解:

$3^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{131}}^1$

素因数の和:213

約数の個数: 72

約数和(自身を含む): 40216176

約数和(自身を除く): 19907901

約数列:

[1, 3, 5, 9, 13, 15, 25, 39, 45, 53, 65, 75, 117, 131, 159, 195, 225, 265, 325, 393, 477, 585, 655, 689, 795, 975, 1179, 1325, 1703, 1965, 2067, 2385, 2925, 3275, 3445, 3975, 5109, 5895, 6201, 6943, 8515, 9825, 10335, 11925, 15327, 17225, 20829, 25545, 29475, 31005, 34715, 42575, 51675, 62487, 76635, 90259, 104145, 127725, 155025, 173575, 270777, 312435, 383175, 451295, 520725, 812331, 1353885, 1562175, 2256475, 4061655, 6769425, 20308275]

約数ペア:

[(1, 20308275), (3, 6769425), (5, 4061655), (9, 2256475), (13, 1562175), (15, 1353885), (25, 812331), (39, 520725), (45, 451295), (53, 383175), (65, 312435), (75, 270777), (117, 173575), (131, 155025), (159, 127725), (195, 104145), (225, 90259), (265, 76635), (325, 62487), (393, 51675), (477, 42575), (585, 34715), (655, 31005), (689, 29475), (795, 25545), (975, 20829), (1179, 17225), (1325, 15327), (1703, 11925), (1965, 10335), (2067, 9825), (2385, 8515), (2925, 6943), (3275, 6201), (3445, 5895), (3975, 5109)]