20564775

素因数分解:

$3^2\times 5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{1187}}^1$

素因数の和:1221

約数の個数: 72

約数和(自身を含む): 45961344

約数和(自身を除く): 25396569

約数列:

[1, 3, 5, 7, 9, 11, 15, 21, 25, 33, 35, 45, 55, 63, 75, 77, 99, 105, 165, 175, 225, 231, 275, 315, 385, 495, 525, 693, 825, 1155, 1187, 1575, 1925, 2475, 3465, 3561, 5775, 5935, 8309, 10683, 13057, 17325, 17805, 24927, 29675, 39171, 41545, 53415, 65285, 74781, 89025, 91399, 117513, 124635, 195855, 207725, 267075, 274197, 326425, 373905, 456995, 587565, 623175, 822591, 979275, 1370985, 1869525, 2284975, 2937825, 4112955, 6854925, 20564775]

約数ペア:

[(1, 20564775), (3, 6854925), (5, 4112955), (7, 2937825), (9, 2284975), (11, 1869525), (15, 1370985), (21, 979275), (25, 822591), (33, 623175), (35, 587565), (45, 456995), (55, 373905), (63, 326425), (75, 274197), (77, 267075), (99, 207725), (105, 195855), (165, 124635), (175, 117513), (225, 91399), (231, 89025), (275, 74781), (315, 65285), (385, 53415), (495, 41545), (525, 39171), (693, 29675), (825, 24927), (1155, 17805), (1187, 17325), (1575, 13057), (1925, 10683), (2475, 8309), (3465, 5935), (3561, 5775)]